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.
x = input().lower()
if "ab" in x:
    x = x.replace("ab",'')
    print(x)
    if "ba" in x:
        print("YES")
    else:
        print("NO")
else:
    if "ba" in x:
        x = x.replace('ba','')
        print(x)
        if 'ab' in x:
            print("YES")
        else:
            print("NO")