Problem 1124. String permutations on phone keyboard

Mehmet OZC

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Given a number such as 2639 return all possible string permutations using the phone-keyboard on Problem 1069.
input = 78
output = {'pt';'pu';'pv';'qt';'qu';'qv';'rt';'ru';'rv';'st';'su';'sv'}

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72 Solutions

25 Solvers

Last Solution submitted on May 26, 2026

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2 Comments

Rafael S.T. Vieira on 1 Sep 2020

This problem needs more test cases, and include the number 1 as well as complete phone numbers.

Dyuman Joshi on 16 Jan 2022

Test suite is updated with additional test cases.

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