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Problem 12 of 50

Easy

What to do

Given a string of lowercase English letters, find and return one letter (a-z) that does NOT appear in the string. Any missing letter is a valid answer.

Key Concepts

string manipulation loops conditional statements basic input/output

Examples

Input: s = 'a'

Output: b

Input: s = 'abcdfhijklmnopqrstuvwxyz'

Output: e

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Tips for Beginners

  • Focus on understanding the logic, not memorizing syntax
  • Use print statements to debug your code
  • Don't worry about input parsing - the function handles that for you
  • If stuck, try writing out your solution on paper first

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