Solution: Valid Word Abbreviation

Statement

Given a string, word, and abbreviation, abbr, return TRUE if the abbreviation matches the given string. Otherwise, return FALSE. An abbreviation can replace any non-adjacent, non-empty substrings of the original word with their lengths. Replacement lengths must not contain leading zeros.

A certain word, "calendar", can be abbreviated as follows:

• "cal3ar" ("cal + end [length = 3] + ar" skipping three characters "end" from the word "calendar" still matches the provided abbreviation)

• "c6r" ("c + alenda [length = 6] + ...