{"raw_statement":[{"iden":"problem statement","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."},{"iden":"constraints","content":"*   $1 ≤ N ≤ 50$\n*   $1 ≤ K ≤ N$\n*   $S$ is a string of length $N$ consisting of `A`, `B` and `C`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$ $K$\n$S$"},{"iden":"sample input 1","content":"3 1\nABC"},{"iden":"sample output 1","content":"aBC"},{"iden":"sample input 2","content":"4 3\nCABA"},{"iden":"sample output 2","content":"CAbA"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}