Problem
Given a string and a character, print the index (0-based) of the second occurrence of that character. If it does not occur twice, print -1.
Input format
Input
input.txt
- First line: the string (up to 100 characters) - Second line: a single character
Output format
Output
output.txt
- Index of second occurrence or -1
Example
input
character a
output
4
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Sample cases (from the problem)
Sample Case 1
Input
character a
Expected output
4
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