def solve():
    N, M = map(int, input().split())
    S = input()
    W = input()
    
    ans = list(S)
    if W == "Warong":
        for i in range(M):
            ans[i] = 'A'
        if ans.count('A') == N - 1:
            for i in range(N):
                if ans[i] != 'A':
                	ans[i] = 'W'
    elif W == "NotWarong":
        if all(c == 'A' for c in ans[:M]):
            for i in range(M, N):
                ans[i] = 'A'
        elif any(c == 'W' for c in ans[M:]) and ans[:M].count('A') == M - 1:
            for i in range(M):
                if ans[i] != 'A':
                	ans[i] = 'W'
    print(''.join(ans))

if __name__ == "__main__":
    solve()