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

dp = [[0]*4 for _ in range(max(N,21)+1)]
dp[0][0] = 1
for i in range(min(N,21)):
	dp[i+1][0] = dp[i][0]
	dp[i+1][1] = dp[i][0] + dp[i][1] + dp[i][2]
	dp[i+1][2] = dp[i][1]
	dp[i+1][3] = dp[i][2] + 2*dp[i][3]

S = ""
count_MMA = 0    # S 以下で"MMA"を含まないやつ
flag = False

for i in range(N):
	if N-i-1 <= 20:
		count_MMA_diff = 2**(N-i-1) if flag or (len(S) >= 2 and S[-2:] == "MM") else dp[N-i-1][3]
		count = count_MMA + count_MMA_diff
		#print(S + "A" +"M"*(N-i-1),count)
		if count >= K:
			flag |= len(S) >= 2 and S[-2:] == "MM"
			S += "A"
		else:
	   	    count_MMA += count_MMA_diff
	   	    S += "M"
	else:
		S += "A"

print(S)