N,K=map(int,input().split())
cnt=0
for i in range(1<<min(N,20)):
    s=[]
    for j in reversed(range(min(N,20))):
        if (i>>j)&1:
            s.append("M")
        else:
            s.append("A")
    s="".join(s)
    if "MMA" in s:
        cnt+=1
        if cnt==K:
            print("A"*max(0,N-20)+s)
            exit()