Score : 100 points
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.
A
, B
and C
.Input is given from Standard Input in the following format:
N K S
Print the string S after lowercasing the K-th character in it.
3 1 ABC
aBC
4 3 CABA
CAbA