my-solutions/leetcode/0017-letter-combinations-of-a-phone-number
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17. Letter Combinations of a Phone Number

Leetcode

Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.

A mapping of digits to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.