N,K=map(int,input().split())
result=[]
M=min(20,N)
from itertools import product
for bit in range(2**M):
  A=[0]*M
  for k in range(M):
    if (bit>>k)&1:
      A[M-1-k]=1
  ans=False
  for j in range(M-2):
    if A[j]==1 and A[j+1]==1 and A[j+2]==0:
      ans=True
      break
  if ans==True:
    p=[0]*M
    for i in range(M):
      if A[i]==1:
        p[i]='M'
      else:
        p[i]='A'
    t=''.join(p)
    result.append(t)
    if len(result)==K:
      break
ans='A'*(N-M)+result[K-1]
print(ans)