Station and Bus

In AtCoder City, there are three stations numbered 1, 2, and 3.

Each of these stations is operated by one of the two railway companies, A and B. A string S of length 3 represents which company operates each station. If S_i is A, Company A operates Station i; if S_i is B, Company B operates Station i.

To improve the transportation condition, for each pair of a station operated by Company A and one operated by Company B, there will be a bus service connecting them.

Determine if there is a pair of stations that will be connected by a bus service.

Constraints

• Each character of S is A or B.
• |S| = 3

Input

Input is given from Standard Input in the following format:

S

Output

If there is a pair of stations that will be connected by a bus service, print Yes; otherwise, print No.

Examples

Input

ABA

Output

Yes

Input

BBA

Output

Yes

Input

BBB

Output

No

inputFormat

Input

Input is given from Standard Input in the following format:

S

outputFormat

Output

If there is a pair of stations that will be connected by a bus service, print Yes; otherwise, print No.

Examples

Input

ABA

Output

Yes

Input

BBA

Output

Yes

Input

BBB

Output

No

样例

ABA

Yes