Problem
Given a string, swap the case of each character (uppercase to lowercase and vice versa).
Input format
Input
input.txt
- A single line with a string (up to 100 characters)
Output format
Output
output.txt
- The string with case swapped
Example
input
HeLLo
output
hEllO
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Sample cases (from the problem)
Sample Case 1
Input
HeLLo
Expected output
hEllO
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