diff --git a/.eslintignore b/.eslintignore
index b7dab5e..aa372ad 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,2 +1,3 @@
 node_modules
-build
\ No newline at end of file
+build
+/src/puzzles/template.ts
\ No newline at end of file
diff --git a/data/day07.txt b/data/day07.txt
new file mode 100644
index 0000000..ecab5f7
--- /dev/null
+++ b/data/day07.txt
@@ -0,0 +1,1089 @@
+$ cd /
+$ ls
+246027 gldg.jrd
+dir qffvbf
+dir qjjgh
+dir vpjqpqfm
+$ cd qffvbf
+$ ls
+dir dcqf
+dir grcj
+dir hwllqcd
+76103 jrhp.hgg
+253696 nscv.wvb
+dir stnrzs
+dir vzgpfd
+$ cd dcqf
+$ ls
+dir gcjmpnsl
+$ cd gcjmpnsl
+$ ls
+198360 gldg.jrd
+$ cd ..
+$ cd ..
+$ cd grcj
+$ ls
+56512 grgtnhn.zdn
+$ cd ..
+$ cd hwllqcd
+$ ls
+100505 frzf.mzc
+209030 gldg.jrd
+9330 jjtjjlsr.dnl
+191034 mfmps.vjt
+82405 nscv.wvb
+$ cd ..
+$ cd stnrzs
+$ ls
+dir gmtmfpmb
+dir jrhp
+dir rhf
+dir wzjtd
+$ cd gmtmfpmb
+$ ls
+279472 hswhjhmj
+81339 rsgsrn
+$ cd ..
+$ cd jrhp
+$ ls
+dir fpmnp
+99771 grcj.scb
+dir hjglg
+dir hwvzv
+$ cd fpmnp
+$ ls
+33215 grcj.tcj
+$ cd ..
+$ cd hjglg
+$ ls
+206893 tctfwpf.jhv
+$ cd ..
+$ cd hwvzv
+$ ls
+dir mfmps
+$ cd mfmps
+$ ls
+46252 rjrmbqwr.wbj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rhf
+$ ls
+222859 dcgvw
+41140 grcj.qzh
+dir zcjh
+217515 zgqjbf
+$ cd zcjh
+$ ls
+92243 prqhbzl.hls
+$ cd ..
+$ cd ..
+$ cd wzjtd
+$ ls
+dir bnjj
+dir dhhpf
+dir grcj
+dir jqmnp
+16602 mfmps.dht
+dir mrgh
+112236 rsgsrn
+dir wqwwwfd
+243851 zgqjbf.bjh
+$ cd bnjj
+$ ls
+158778 zjdvggcz.fhr
+$ cd ..
+$ cd dhhpf
+$ ls
+228680 gldg.jrd
+18523 wcfpqqp.tcf
+$ cd ..
+$ cd grcj
+$ ls
+dir bcbspw
+dir mpq
+dir pjzw
+$ cd bcbspw
+$ ls
+5449 rsgsrn
+$ cd ..
+$ cd mpq
+$ ls
+135338 mfmps
+$ cd ..
+$ cd pjzw
+$ ls
+dir cpffwn
+$ cd cpffwn
+$ ls
+131835 rnwqngz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jqmnp
+$ ls
+281939 nscv.wvb
+103834 rsgsrn
+34528 wcfpqqp.tcf
+$ cd ..
+$ cd mrgh
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+211470 bbzm.sbq
+$ cd ..
+$ cd ..
+$ cd wqwwwfd
+$ ls
+59532 blfr.lqh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vzgpfd
+$ ls
+dir grcj
+dir lvhfqr
+dir zgvjpnf
+$ cd grcj
+$ ls
+160936 jbfsbsnn.sgj
+dir mfmps
+dir mfqjssr
+dir vzgpfd
+dir zgqjbf
+$ cd mfmps
+$ ls
+176441 dcgvw
+9961 grcj.sdl
+dir mfmps
+181303 nscv.wvb
+273550 zfjhqtp
+$ cd mfmps
+$ ls
+dir ndqjhlhp
+$ cd ndqjhlhp
+$ ls
+43593 wcfpqqp.tcf
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mfqjssr
+$ ls
+137211 gldg.jrd
+254301 grcj.rgv
+$ cd ..
+$ cd vzgpfd
+$ ls
+dir hqnfwtj
+dir mtqzh
+215717 thd.cgt
+dir vgtvctd
+dir vzgpfd
+64282 zgqjbf
+$ cd hqnfwtj
+$ ls
+155738 cjpqzq
+128579 cnsm.mdt
+150972 fpmjd
+54851 rsgsrn
+$ cd ..
+$ cd mtqzh
+$ ls
+288824 bjnhtwg
+209838 gldg.jrd
+87464 jgdhm.wrb
+dir nbnzfc
+$ cd nbnzfc
+$ ls
+dir rtrbhtb
+267378 wcfpqqp.tcf
+152165 wsww.gdd
+$ cd rtrbhtb
+$ ls
+264454 dcgvw
+221078 jrhp.fsj
+dir sgm
+$ cd sgm
+$ ls
+dir tzzfc
+$ cd tzzfc
+$ ls
+207888 cdmht.jjn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vgtvctd
+$ ls
+dir dtm
+dir gghjmgqs
+dir grcj
+dir lcpmlcpn
+57113 njpnzq.phl
+279566 rsgsrn
+59404 tzl
+221164 vcpzw.qsh
+$ cd dtm
+$ ls
+dir pmsvz
+dir zdzv
+$ cd pmsvz
+$ ls
+dir qctt
+$ cd qctt
+$ ls
+285640 wzh.hwv
+$ cd ..
+$ cd ..
+$ cd zdzv
+$ ls
+178732 fdvth.rvs
+dir jjslblcb
+dir tvq
+dir zgqjbf
+$ cd jjslblcb
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+186485 wcfpqqp.tcf
+$ cd ..
+$ cd ..
+$ cd tvq
+$ ls
+48035 jrhp.qnf
+$ cd ..
+$ cd zgqjbf
+$ ls
+276537 gldg.jrd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd gghjmgqs
+$ ls
+238068 qqczbf
+$ cd ..
+$ cd grcj
+$ ls
+dir qnn
+$ cd qnn
+$ ls
+117284 jmst.mld
+$ cd ..
+$ cd ..
+$ cd lcpmlcpn
+$ ls
+dir cbzpzsj
+53036 frzslwl.qgd
+82430 grcj
+273768 pvzslpsn.ztw
+67092 rsgsrn
+$ cd cbzpzsj
+$ ls
+36456 gldg.jrd
+95656 mfmps.cfl
+2578 qpl.jhn
+225756 sqt.njp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vzgpfd
+$ ls
+266582 cgvcwrfn.jjq
+230770 dcgvw
+266361 gqqcqtp.hvq
+dir lnn
+86659 pzft.smj
+180519 qfszrvm.gnq
+dir rwrt
+dir thrthq
+dir zgqjbf
+$ cd lnn
+$ ls
+13294 dqqvbcf
+268614 mczrlg.vmz
+dir wqccmlvq
+dir zgqjbf
+$ cd wqccmlvq
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+55504 gldg.jrd
+6925 jbqzth.rcj
+168475 jqzmc.sfm
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+172255 nptpqjd.hzz
+$ cd ..
+$ cd ..
+$ cd rwrt
+$ ls
+78039 jrhp.cmf
+237632 mfmps
+$ cd ..
+$ cd thrthq
+$ ls
+122514 jrhp.fcj
+$ cd ..
+$ cd zgqjbf
+$ ls
+dir dpbnq
+dir mfmps
+dir rbnzhhn
+$ cd dpbnq
+$ ls
+dir vzgpfd
+$ cd vzgpfd
+$ ls
+278947 bhdtwf
+$ cd ..
+$ cd ..
+$ cd mfmps
+$ ls
+118315 mfmps.lbq
+$ cd ..
+$ cd rbnzhhn
+$ ls
+96386 svwv.ldj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+196735 cmrdgjl.hbd
+$ cd ..
+$ cd ..
+$ cd lvhfqr
+$ ls
+dir njzv
+dir sgwzscp
+dir zgqjbf
+$ cd njzv
+$ ls
+60680 bmqh.snz
+129703 wcfpqqp.tcf
+$ cd ..
+$ cd sgwzscp
+$ ls
+dir rnjrj
+1799 vzgpfd
+37203 zgqjbf.jwf
+25768 zjh
+$ cd rnjrj
+$ ls
+242223 blrzc
+63563 plb.dlq
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+91151 cmn.gcw
+235818 llsnw.phb
+$ cd ..
+$ cd ..
+$ cd zgvjpnf
+$ ls
+158932 nscv.wvb
+110912 wzm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qjjgh
+$ ls
+dir cwslqsb
+34405 dcgvw
+dir fvmmd
+dir jrhp
+dir vflhljrl
+239915 vzgpfd
+$ cd cwslqsb
+$ ls
+49934 mqzfncgb.jbf
+$ cd ..
+$ cd fvmmd
+$ ls
+dir grcj
+dir jrhp
+dir sqmbncp
+dir vzgpfd
+$ cd grcj
+$ ls
+32276 bjgc
+211068 mfmps
+$ cd ..
+$ cd jrhp
+$ ls
+218633 wpqh.jfl
+$ cd ..
+$ cd sqmbncp
+$ ls
+137187 tzqqm.jqr
+$ cd ..
+$ cd vzgpfd
+$ ls
+258286 hqg.qzn
+dir mvqgb
+236455 vqdtns
+255724 wrnhw.mzf
+192529 zgqjbf.zzb
+$ cd mvqgb
+$ ls
+dir vzgpfd
+$ cd vzgpfd
+$ ls
+200955 grcj.wwl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jrhp
+$ ls
+86368 dcgvw
+16512 vzgpfd
+245341 wcfpqqp.tcf
+$ cd ..
+$ cd vflhljrl
+$ ls
+82670 gldg.jrd
+228251 nscv.wvb
+$ cd ..
+$ cd ..
+$ cd vpjqpqfm
+$ ls
+246705 gfff
+dir grcj
+dir hjdwrt
+dir mfmps
+dir plrrsmph
+dir rgqtzc
+175555 rsgsrn
+142983 wjpbr.hdr
+dir zlv
+$ cd grcj
+$ ls
+dir grcj
+dir mdvcmm
+285341 mfmps
+89089 nscv.wvb
+$ cd grcj
+$ ls
+dir fcdz
+dir fswpmd
+dir gvjjjp
+dir jrhp
+$ cd fcdz
+$ ls
+dir dpwvm
+dir rmmw
+$ cd dpwvm
+$ ls
+dir chjbpb
+118852 dcgvw
+dir dsc
+7271 fclhnmz.cbp
+$ cd chjbpb
+$ ls
+41211 pzr
+$ cd ..
+$ cd dsc
+$ ls
+217960 nscv.wvb
+$ cd ..
+$ cd ..
+$ cd rmmw
+$ ls
+dir cqzvcv
+dir hld
+99687 jrhp.nnb
+dir pfvthfw
+97451 qjmfdjwz.phc
+$ cd cqzvcv
+$ ls
+dir zgqjbf
+$ cd zgqjbf
+$ ls
+204153 nscv.wvb
+$ cd ..
+$ cd ..
+$ cd hld
+$ ls
+113905 pwqs
+244609 wfsgg.jgp
+$ cd ..
+$ cd pfvthfw
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+207441 jrhp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fswpmd
+$ ls
+99446 gldg.jrd
+$ cd ..
+$ cd gvjjjp
+$ ls
+dir pvzz
+279071 wdmm.vjv
+$ cd pvzz
+$ ls
+196937 nqfzj
+273491 nscv.wvb
+dir qthbl
+$ cd qthbl
+$ ls
+204553 dcgvw
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd jrhp
+$ ls
+175979 fct.dcg
+$ cd ..
+$ cd ..
+$ cd mdvcmm
+$ ls
+dir crscnnh
+109461 dcdtm.tvp
+279544 ftzvrpcw.pff
+124059 nnc
+274104 nscv.wvb
+dir ssvd
+dir zvvhlw
+$ cd crscnnh
+$ ls
+dir tzbjl
+$ cd tzbjl
+$ ls
+112219 wcfpqqp.tcf
+$ cd ..
+$ cd ..
+$ cd ssvd
+$ ls
+227906 bsqhzw
+$ cd ..
+$ cd zvvhlw
+$ ls
+166628 gldg.jrd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hjdwrt
+$ ls
+59644 jrhp.fjj
+dir rpsrm
+221706 rsgsrn
+dir rzn
+14344 tvlmvr.flr
+dir vlbrnq
+dir vrcns
+39113 wcfpqqp.tcf
+dir zhwm
+$ cd rpsrm
+$ ls
+282957 wmpnpjzd
+$ cd ..
+$ cd rzn
+$ ls
+142973 wcfpqqp.tcf
+$ cd ..
+$ cd vlbrnq
+$ ls
+79661 ccznjt.fqr
+$ cd ..
+$ cd vrcns
+$ ls
+262645 dcnnnhn.vhg
+$ cd ..
+$ cd zhwm
+$ ls
+dir glgs
+dir grcj
+dir jrhp
+$ cd glgs
+$ ls
+282326 tcw.qnb
+$ cd ..
+$ cd grcj
+$ ls
+43293 qnqb.jqg
+$ cd ..
+$ cd jrhp
+$ ls
+197274 pgf.ltc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd mfmps
+$ ls
+dir dcm
+47902 mrcn.wtb
+8444 mzdgdh.ctn
+$ cd dcm
+$ ls
+72397 mnrvqg.vmm
+$ cd ..
+$ cd ..
+$ cd plrrsmph
+$ ls
+216816 gldg.jrd
+148190 jzbswh
+120319 wcfpqqp.tcf
+dir zgqjbf
+$ cd zgqjbf
+$ ls
+dir cfdr
+dir hdsnc
+$ cd cfdr
+$ ls
+34272 bzctmbvt.qzr
+$ cd ..
+$ cd hdsnc
+$ ls
+43772 ccds.vlz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rgqtzc
+$ ls
+dir dblznh
+dir lfpdqm
+dir lmnmthm
+dir mfmps
+dir pcplzs
+dir pvfbjm
+dir rnl
+dir wqgp
+dir zgqjbf
+$ cd dblznh
+$ ls
+65168 tdv.mwq
+$ cd ..
+$ cd lfpdqm
+$ ls
+dir cgvnspv
+dir dthhvrln
+dir jrhp
+dir vzgpfd
+$ cd cgvnspv
+$ ls
+dir qnmg
+$ cd qnmg
+$ ls
+dir grcj
+70937 jbvrp.psn
+207093 vfgds.tjv
+282330 vtlzgq.dfd
+251235 zbvgc.whr
+$ cd grcj
+$ ls
+dir pbn
+$ cd pbn
+$ ls
+22094 dqt.dtv
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dthhvrln
+$ ls
+206159 wvvczgd.wzs
+$ cd ..
+$ cd jrhp
+$ ls
+dir bqf
+5738 rgpwf
+dir zjhw
+$ cd bqf
+$ ls
+dir clgjfn
+58416 fcr
+216467 mcdqnw.prv
+288978 zthdgfhl.lqq
+$ cd clgjfn
+$ ls
+274929 lwnpggm.mfp
+$ cd ..
+$ cd ..
+$ cd zjhw
+$ ls
+dir cbwrrzwh
+dir fdz
+dir grcj
+219439 grcj.szv
+285756 mfmps
+113288 mmg.cpr
+236059 nmq
+dir pbnfdq
+74013 tvmswr
+dir zgqjbf
+$ cd cbwrrzwh
+$ ls
+223425 zgqjbf.ffm
+$ cd ..
+$ cd fdz
+$ ls
+dir wbtzsr
+$ cd wbtzsr
+$ ls
+257781 hzf
+$ cd ..
+$ cd ..
+$ cd grcj
+$ ls
+58266 dcgvw
+dir rhncgdll
+dir vzgpfd
+12503 zgv.ndt
+$ cd rhncgdll
+$ ls
+dir vnmbhbhc
+$ cd vnmbhbhc
+$ ls
+10019 lfcggd.ccw
+$ cd ..
+$ cd ..
+$ cd vzgpfd
+$ ls
+134965 zdsp.tzg
+78684 zmjjvf.glv
+$ cd ..
+$ cd ..
+$ cd pbnfdq
+$ ls
+173729 frqdqhw
+dir fvjc
+41055 svwd
+106934 tngzpl.lml
+dir zqhjjjd
+$ cd fvjc
+$ ls
+88907 pcvcpptp.dsr
+133102 tszsbtjp.lfl
+$ cd ..
+$ cd zqhjjjd
+$ ls
+61260 mpdlcjl
+dir wfw
+$ cd wfw
+$ ls
+dir jrhp
+dir lwg
+226393 rndnc
+dir zhrtj
+$ cd jrhp
+$ ls
+276912 dcgvw
+dir pwrjq
+dir zmnv
+$ cd pwrjq
+$ ls
+198180 vclfmjf.tfp
+$ cd ..
+$ cd zmnv
+$ ls
+84228 mfmps.wzw
+$ cd ..
+$ cd ..
+$ cd lwg
+$ ls
+dir jrhp
+50562 lwcfwjh.dtm
+145174 vnl
+$ cd jrhp
+$ ls
+86877 dcgvw
+$ cd ..
+$ cd ..
+$ cd zhrtj
+$ ls
+284728 rsgsrn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+202268 zqpvm
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vzgpfd
+$ ls
+138188 djqqfrbn.cps
+$ cd ..
+$ cd ..
+$ cd lmnmthm
+$ ls
+2715 fqdm.bvm
+37482 jdsn.zpr
+255467 nscv.wvb
+175914 stvscbg
+$ cd ..
+$ cd mfmps
+$ ls
+288712 gldg.jrd
+182389 jrhp
+dir lvjg
+41815 nscv.wvb
+dir vzgpfd
+dir zgqjbf
+dir zvpnq
+$ cd lvjg
+$ ls
+184529 wcfpqqp.tcf
+$ cd ..
+$ cd vzgpfd
+$ ls
+265556 hjqng.glq
+$ cd ..
+$ cd zgqjbf
+$ ls
+dir dqmbmlrf
+dir grcj
+dir hlsr
+$ cd dqmbmlrf
+$ ls
+dir bdvhvwct
+254123 bzhhm.rqp
+172950 fgqbj.bcb
+7417 fjfq.qbv
+188707 hfvvlvqg.sqh
+78273 ppljtfjr.hpm
+dir zgqjbf
+$ cd bdvhvwct
+$ ls
+76840 gldg.jrd
+dir grcj
+$ cd grcj
+$ ls
+dir vzgpfd
+$ cd vzgpfd
+$ ls
+73163 mfmps.tnr
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+62316 lpzsww
+$ cd ..
+$ cd ..
+$ cd grcj
+$ ls
+160721 bwvgdqdr
+$ cd ..
+$ cd hlsr
+$ ls
+214688 vzgpfd
+$ cd ..
+$ cd ..
+$ cd zvpnq
+$ ls
+34940 gjbzp.nqg
+165326 mfmps.gfp
+dir rwddqchj
+dir ssw
+dir zgqjbf
+$ cd rwddqchj
+$ ls
+dir gnsndln
+$ cd gnsndln
+$ ls
+223320 zgqjbf.wlm
+$ cd ..
+$ cd ..
+$ cd ssw
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+251146 gldg.jrd
+$ cd ..
+$ cd ..
+$ cd zgqjbf
+$ ls
+45732 vzgpfd.nbz
+86126 zdnv.sss
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pcplzs
+$ ls
+90287 grcj
+99213 rsgsrn
+dir shmsp
+156357 tgc.lzp
+dir thbznt
+dir vtqlszrs
+dir vzgpfd
+$ cd shmsp
+$ ls
+dir jrhp
+$ cd jrhp
+$ ls
+132784 tmlntm
+$ cd ..
+$ cd ..
+$ cd thbznt
+$ ls
+190697 mdj.lll
+270626 wcfpqqp.tcf
+$ cd ..
+$ cd vtqlszrs
+$ ls
+44292 dcgvw
+$ cd ..
+$ cd vzgpfd
+$ ls
+13921 hccgnjqh.cdl
+dir jrhp
+23850 jvq
+113952 mfmps
+dir ppdfjqbr
+dir vdpvzhrs
+190631 vzgpfd
+128060 wclfwhv.chh
+dir wghzqb
+$ cd jrhp
+$ ls
+237755 bgbmnpq
+19551 dcgvw
+$ cd ..
+$ cd ppdfjqbr
+$ ls
+1458 dcgvw
+563 gldg.jrd
+155487 glhjmpm.sjt
+dir vthf
+dir vzgpfd
+81314 zgqjbf.scm
+$ cd vthf
+$ ls
+205316 vzgpfd.qlg
+$ cd ..
+$ cd vzgpfd
+$ ls
+46597 mfmps.zsq
+$ cd ..
+$ cd ..
+$ cd vdpvzhrs
+$ ls
+13302 vcwrr.jvb
+$ cd ..
+$ cd wghzqb
+$ ls
+dir grcj
+dir hbngsg
+112293 jzvh.pvf
+282888 smrq.lvp
+$ cd grcj
+$ ls
+258764 nscv.wvb
+230478 qpqgf
+$ cd ..
+$ cd hbngsg
+$ ls
+101699 bzwnwz.tgj
+144196 hwjrgtt.pdm
+dir mthnljv
+$ cd mthnljv
+$ ls
+1397 jrhp.rvp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd pvfbjm
+$ ls
+251602 nscv.wvb
+$ cd ..
+$ cd rnl
+$ ls
+233954 dqlncnds.dfn
+dir nswpmqdd
+$ cd nswpmqdd
+$ ls
+261883 rtpbgm.gbf
+$ cd ..
+$ cd ..
+$ cd wqgp
+$ ls
+23813 pdfcfc
+$ cd ..
+$ cd zgqjbf
+$ ls
+15126 bvlbrq.pdj
+dir jnjqhzh
+dir smrzsq
+dir vzgpfd
+$ cd jnjqhzh
+$ ls
+243919 htdqwdc.nsr
+254015 ppclcr.rms
+234928 zmjr.hnt
+$ cd ..
+$ cd smrzsq
+$ ls
+dir ljvbmm
+$ cd ljvbmm
+$ ls
+235241 jmcbrbdl.ccr
+$ cd ..
+$ cd ..
+$ cd vzgpfd
+$ ls
+dir bhwd
+38855 dcgvw
+dir hdcqm
+dir swcvhtmp
+dir zgqjbf
+118104 zhtlsdb.ncw
+$ cd bhwd
+$ ls
+122018 gldg.jrd
+dir lmjr
+dir mfmps
+$ cd lmjr
+$ ls
+40588 dcgvw
+$ cd ..
+$ cd mfmps
+$ ls
+dir grcj
+$ cd grcj
+$ ls
+165840 zwbvbfj
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hdcqm
+$ ls
+156543 qfb.vhv
+$ cd ..
+$ cd swcvhtmp
+$ ls
+227964 rrfnsqw.rvh
+$ cd ..
+$ cd zgqjbf
+$ ls
+94269 mfmps.jsq
+266360 rsgsrn
+252761 zlz
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd zlv
+$ ls
+127388 nscv.wvb
\ No newline at end of file
diff --git a/src/puzzles/day06.ts b/src/puzzles/day06.ts
index 2f937da..1f073d6 100644
--- a/src/puzzles/day06.ts
+++ b/src/puzzles/day06.ts
@@ -1,12 +1,12 @@
-import {Solution} from '../types';
+import { Solution } from '../types';
 
 const solve = (input: string, length = 4): number => {
   for (let i = 0; i < input.length - length; i++) {
     if (!input.substring(i, i + length).match(/(.).*\1/)) return i + length;
   }
   return 0;
-}
+};
 
 export default (dataSet: string): Solution => {
   return { puzzle1: solve(dataSet), puzzle2: solve(dataSet, 14) };
-} 
\ No newline at end of file
+};
diff --git a/src/puzzles/day07.ts b/src/puzzles/day07.ts
new file mode 100644
index 0000000..51f8faa
--- /dev/null
+++ b/src/puzzles/day07.ts
@@ -0,0 +1,53 @@
+import { Solution } from '../types';
+
+interface FileSystem {
+  [key: string]: number;
+}
+
+const solve = (dataSet: string): Solution => {
+  const data = dataSet.split('\n');
+  let totalSpace = 0;
+  let freedSpace = 0;
+  const needed = 30000000;
+  let diskSpace = 70000000;
+  const directories: string[] = [];
+  const dirMap: FileSystem = {};
+
+  for (const line of data) {
+    if (/^\$ cd/.test(line)) {
+      const cd = line.substring(5);
+      cd === '..' ? directories.pop() : directories.push(cd);
+    } else if (/^\d/.test(line)) {
+      const file = line.split(' ');
+      let path = '';
+      for (let i = 0; i < directories.length; i++) {
+        path += directories[i] !== '/' ? directories[i] + '/' : directories[i];
+        let innerSize = parseInt(file[0]);
+        if (path in dirMap) {
+          innerSize += dirMap[path];
+        }
+        dirMap[path] = innerSize;
+      }
+    }
+  }
+  diskSpace -= dirMap['/'];
+
+  //iterate through each item in dirMap
+  Object.values(dirMap).forEach((size) => {
+    // For Solution 1
+    totalSpace += size <= 100000 ? size : 0;
+
+    // For Solution 2
+    const diffFreed = Math.abs(freedSpace - needed);
+    const diffSize = Math.abs(diskSpace + size - needed);
+    if (diskSpace + size >= needed && diffSize < diffFreed) {
+      if (freedSpace === 0 || size < freedSpace) freedSpace = size;
+    }
+  });
+
+  return { puzzle1: totalSpace, puzzle2: freedSpace };
+};
+
+export default (dataSet: string): Solution => {
+  return solve(dataSet);
+};
diff --git a/src/puzzles/index.ts b/src/puzzles/index.ts
index ee02553..acabd70 100644
--- a/src/puzzles/index.ts
+++ b/src/puzzles/index.ts
@@ -6,6 +6,7 @@ import Day03 from './day03';
 import Day04 from './day04';
 import Day05 from './day05';
 import Day06 from './day06';
+import Day07 from './day07';
 
 export default {
   day01: Day01,
@@ -13,5 +14,6 @@ export default {
   day03: Day03,
   day04: Day04,
   day05: Day05,
-  day06: Day06
-} as Puzzles
\ No newline at end of file
+  day06: Day06,
+  day07: Day07,
+} as Puzzles;
diff --git a/src/puzzles/template.ts b/src/puzzles/template.ts
index 3b7eb1c..52f1152 100644
--- a/src/puzzles/template.ts
+++ b/src/puzzles/template.ts
@@ -1,7 +1,7 @@
-import {Solution} from '../types';
+import { Solution } from '../types';
 
 export default (dataSet: string): Solution => {
   // Start Code
 
   return { puzzle1: 0, puzzle2: 0 };
-} 
\ No newline at end of file
+};