#include <bits/stdc++.h>

using namespace std;
string s;
int n,k;
int main()
{
    cin>>n>>k>>s;
    s[k-1]+=32;
    cout<<s;
    return 0;
}

### Prompt

Create a solution in Cpp for the following problem:

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.

Constraints

* 1 ≤ N ≤ 50
* 1 ≤ K ≤ N
* S is a string of length N consisting of `A`, `B` and `C`.

Input

Input is given from Standard Input in the following format:


N K
S


Output

Print the string S after lowercasing the K-th character in it.

Examples

Input

3 1
ABC


Output

aBC


Input

4 3
CABA


Output

CAbA

### Response

```cpp
#include <bits/stdc++.h>

using namespace std;
string s;
int n,k;
int main()
{
    cin>>n>>k>>s;
    s[k-1]+=32;
    cout<<s;
    return 0;
}

```