N, K = map(int, input().split())
S = input()
[print(S[i].lower(), end='') if i == K-1 else print(S[i], end='') for i in range(len(S))] N, K = map(int, input().split()) N map(int, input().split()) map int input().split() ().split () input split K S = input() S input() input print(S[i].lower(), end='') if i == K-1 else print(S[i], end='') for i in range(len(S)) for i in range(len(S)) i range(len(S)) range len(S) len S for i in range(len(S)) print(S[i].lower(), end='') if i == K-1 else print(S[i], end='') i == K-1 i K-1 K 1 print(S[i].lower(), end='') print S[i].lower() [i].lower [i] S i lower end='' end '' print(S[i], end='') print S[i] S i end='' end '' [print(S[i].lower(), end='') if i == K-1 else print(S[i], end='') for i in range(len(S))] K = map(int, input().split()) map(int, input().split()) K N, K = map(int, input().split()) map(int, input().split()) N S = input() input() S
N, K = map(int, input().split())
S = input()
[print(S[i].lower(), end='') if i == K-1 else print(S[i], end='') for i in range(len(S))]