timeconversion

import java.io.*;
import java.math.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;

public class Solution {

    /*
     * Complete the timeConversion function below.
     */
    static String timeConversion(String s) {
        //if last 2 digits are "AM", then just remove the AM part, otherwise +12 to the hours
        int l = s.length();
        String a = s.substring(l-2,l);
        String b = s.substring(0, l-2);
        String c = s.substring(0, 2);
        String d = s.substring(2, l-2);
        if((a.equals("AM") && !c.equals("12")) || a.equals("PM") && c.equals("12")){
            return(b);
        }
        else if(c.equals("12")){
            String e = "00";
            return(e + d);
        }
        else{
            int f = Integer.valueOf(c) + 12;
            String g = String.valueOf(f);
            return(g+d);
        }
            
}

    private static final Scanner scan = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bw = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String s = scan.nextLine();

        String result = timeConversion(s);

        bw.write(result);
        bw.newLine();

        bw.close();
    }
}