1309. Decrypt String from Alphabet to Integer Mapping

You are given a string s formed by digits and '#'. We want to map s to English lowercase characters as follows: - Characters ('a' to 'i') are represented by ('1' to '9') respectively. - Characters ('j' to 'z') are represented by ('10#' to '26#') respectively. Return the string formed after mapping. The test cases are generated so that a unique mapping will always exist. Example 1: Input: s