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] + r" skipping six characters "alenda" from the word "calendar" still matches the provided abbreviation)

The word "internationalization" can also be abbreviated as "i18n" (the abbreviation comes from skipping 18 characters in "internationalization" leaving the first and last letters "i" and "n").

The following are not valid abbreviations:

• "c06r" (Has leading zeroes)

• "cale0ndar" (Replaces an empty string)

• "c24r" ("c al enda r" the replaced substringsA substring is a contiguous non-empty sequence of characters within a string. are adjacent)

Constraints:

• $1 \leq$ word.length $\leq 20$

• The word consists of only lowercase English letters.

• $1 \leq$ abbr.length $\leq 10$

• abbr consists of lowercase English letters and digits.

• All the integers in abbr will fit in a $32$–bit integer.

Examples