{"problem":{"name":"Changing a Character","description":{"content":"You are given a string $S$ of length $N$ consisting of `A`, `B` and `C`, and an integer $K$ which is between $1$ and $N$ (inclusive). Print the string $S$ after lowercasing the $K$\\-th character in it","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc126_a"},"statements":[{"statement_type":"Markdown","content":"You are given a string $S$ of length $N$ consisting of `A`, `B` and `C`, and an integer $K$ which is between $1$ and $N$ (inclusive). Print the string $S$ after lowercasing the $K$\\-th character in it.\n\n## Constraints\n\n*   $1 ≤ N ≤ 50$\n*   $1 ≤ K ≤ N$\n*   $S$ is a string of length $N$ consisting of `A`, `B` and `C`.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$N$ $K$\n$S$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc126_a","tags":[],"sample_group":[["3 1\nABC","aBC"],["4 3\nCABA","CAbA"]],"created_at":"2026-03-03 11:01:14"}}