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

cnt = 0
for i in range(1 << 20):
    ok = False
    for j in range(20-2):
        a = i & (1 << j)
        b = i & (1 << (j+1))
        c = i & (1 << (j+2))
        if not a and b and c:
            ok = True
            break

    if ok:
        cnt += 1
        if cnt == K:
            bs = [('M' if i & (1 << j) else 'A') for j in range(N)]
            print(''.join(reversed(bs)))
            break