Single Occurrence

Published by Mubashir Hassan in
language_fundamentalsstrings

Create a function that, given a string str, finds a letter that has a single occurrence. Return the letter in uppercase.

Examples

singleOccurrence("EFFEAABbc") ➞ "C"

singleOccurrence("AAAAVNNNNSS") ➞ "V"

singleOccurrence("S") ➞ "S"

Notes

The function will not be case sensitive.

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