Lantern Lighting

You are given a non-empty string s consisting only of the characters A and B. Your task is to determine whether it is possible to light up at least one lantern. A lantern lights up if and only if there is at least one A in the string.

Formally, let \(s\) be a string, then print "Yes" if \(s\) contains the character A (i.e. \(\exists i, s_i = A\)) and "No" otherwise.

Example:

• Input: BBAAB → Output: Yes
• Input: BB → Output: No

inputFormat

The input consists of a single line containing a non-empty string s made up of characters 'A' and 'B'.

outputFormat

Output "Yes" if there is at least one 'A' in the string; otherwise, output "No".

BBAAB

Yes