Solution: Letter Combinations of a Phone Number
Let's solve the Letter Combinations of a Phone Number problem using the Subsets pattern.
We'll cover the following
Statement
Given a string containing digits from 2 to 9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.
The illustration below shows the mapping of digits to letters in a telephone dial pad.
Note: The number on the telephone dial pad does not correspond to any letter, so the input string only contains digits from to .
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