You are given string *s*. Your task is to determine if the given string *s* contains two non-overlapping substrings "AB" and "BA" (the substrings can go in any order).
The only line of input contains a string *s* of length between 1 and 10<sup class="upper-index">5</sup> consisting of uppercase Latin letters.
ans=input()
n1=ans.count('A')
n2=ans.count('B')
n3=ans.count('AB')
n4=ans.count('BA')
print(n1,n2,n3,n4)
if n1 and n2 and n1>1 and n2>1:
    print("YES")
else:
    print("NO")