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

nex=0
while K:
  nex+=1 
  s=bin(nex)
  if '110' in bin(nex):
    K-=1 
S=bin(nex)[2:]

ans=[]
for i in range(N-len(S)):
  ans.append('A')
for s in S:
  if s=='0':
    ans.append('A')
  else:
    ans.append('M')
print(''.join(ans))