n, k = map(int, input().split())
cnt = 0
for i in range(1<<min(n, 20)):
    s = ""
    for j in range(min(n, 20)):
        s = "AM"[i%2] + s
        i //= 2
    if "MMA" in s:
        cnt += 1
        if cnt == k:
            print("A" * (n - 20) + s)
            break