P2857 - ABC126A - Changing a Character

Memory Limit：128 MB Time Limit：1.000 S

Judge Style：Text Compare Creator：

Submit：0 Solved：0

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.

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

2857: ABC126A - Changing a Character