Task question.

TASK :)

Here's the question for the solution code(nice-string).

Nice String

A string is nice if at least two of the following conditions are satisfied.

1. It doesn't contain substrings bu, ba, or be.
2. It contains at least three vowels (vowels are a, e, i, o, and u).
3. It contains a double letter (at least two similar letters following one another), like b in "abba".

Your task is to check whether a given string is nice. Strings for this task will consist of lowercase letters only. Note that for the purpose of this task, you don't need to consider 'y' as a vowel.

Note that any two conditions might be satisfied to make a string nice. For instance, "aei" satisfies only the conditions #1 and #2, and ```"nn"` satisfies the conditions #1 and #3, which means both strings are nice.

Example 1

"bac" isn't nice. No conditions are satisfied: it contains a ba substring, contains only one vowel and no doubles.

Example 2

"aza" isn't nice. Only the first condition is satisfied, but the string doesn't contain enough vowels or doubles.

Example 3

"abaca" isn't nice. The second condition is satisfied: it contains three vowels a, but the other two aren't satisfied: it contains ba and no doubles.

Example 4

"baaa" is nice. The conditions #2 and #3 are satisfied: it contains three vowels a and a double a.

Example 5

"aaab" is nice, because all three conditions are satisfied.

Run TestNiceString to check your solution.