Problem
Given two strings S and T (lowercase only), check if S is a subsequence of T using recursion.
Input format
Input
input.txt
- Two lines: S and T (1 ≤ |S|, |T| ≤ 50)
Output format
Output
output.txt
- "YES" if S is a subsequence of T, "NO" otherwise
Example
input
ace abcde
output
YES
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Sample cases (from the problem)
Sample Case 1
Input
ace abcde
Expected output
YES
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