from itertools import count

N, K = map(int, input().split())


def digit(bit, idx):
    return (bit >> idx) & 1


cnt = 0
for bit in count():
    is_ok = False
    for i in range(bit.bit_length() - 2):
        if (digit(bit, i), digit(bit, i + 1), digit(bit, i + 2)) == (0, 1, 1):
            is_ok = True
            break

    if is_ok:
        cnt += 1

    if cnt >= K:
        ans = ["A"] * N
        for i in range(bit.bit_length()):
            ans[~i] = "M" if digit(bit, i) == 1 else "A"

        print(*ans, sep="")
        break