Practice Reverse Only Letters
Read the task, work through the examples, and check your approach against the constraints. Use the original LeetCode task for coding and submissions.
Problem Statement
Reverse the order of all uppercase and lowercase English letters in s while leaving every nonletter character at its original index. Return the resulting string.
Source: Reverse Only Letters on LeetCode. Use the original task for its coding environment and submissions.
Examples
# Example 1
Input
s = "ab-cd"
Output
"dc-ba"
# Example 2
Input
s = "a-bC-dEf-ghIj"
Output
"j-Ih-gfE-dCba"
# Example 3
Input
s = "Test1ng-Leet=code-Q!"
Output
"Qedo1ct-eeLg=ntse-T!"
Constraints
1 <= s.length <= 100
s consists of characters with ASCII values in the range [33, 122].
s does not contain '\"' or '\\'.
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