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Problem
Given a string S and an integer N (1-based), replace the N-th character with '#' and print the result. If N is out of bounds, print the string unchanged.
Input format
Input
input.txt
- String S (1–100) - Integer N (1–100)
Output format
Output
output.txt
- Modified string
Example
input
openai 3
output
op#nai
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Sample cases (from the problem)
Sample Case 1
Input
openai 3
Expected output
op#nai
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