N,K = map(int, input().split())
g = []
for i in range(1<<18):
    l = []
    flag = False
    for j in range(18):
        if (i>>j) & 1:
            l.append("M")
        else:
            l.append("A")
        if len(l) >= 3 and l[j-2] == "M" and l[j-1] == "M" and l[j] == "A":
            flag = True
    if flag:
        g.append("".join(l))
g.sort()
x = "A"*100000+g[K-1]
print(x[-N:])