Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

ABA

Sample Output 1

Yes

Company A operates Station 1 and 3, while Company B operates Station 2.

There will be a bus service between Station 1 and 2, and between Station 2 and 3, so print Yes.

Sample Input 2

BBA

Sample Output 2

Yes

Company B operates Station 1 and 2, while Company A operates Station 3.

There will be a bus service between Station 1 and 3, and between Station 2 and 3, so print Yes.

Sample Input 3

BBB

Sample Output 3

No

Company B operates all the stations. Thus, there will be no bus service, so print No.

Solution in PyPy3 (2.4.0) (judge verdict: Runtime Error)

def main():

    S = input().split()
    Q = int(input())

    # for _ in range(Q):
    #     q = input().split()
    #     if q[0] == '1':
    #         S.reverse()
    #     elif q[0] == '2':
    #         if q[1] == '1':
    #             tmp = [q[2]]
    #             tmp.extend(S)
    #             S = tmp
    #         elif q[1] == '2':
    #             S.append(q[2])
    # print("".join(S))
    q_list = []
    for _ in range(Q):
        q_list.append(input().split())

    for q in q_list:
        if q[0] == '1':
            S.reverse()
        elif q[0] == '2':
            if q[1] == '1':
                tmp = [q[2]]
                tmp.extend(S)
                S = tmp
            elif q[1] == '2':
                S.append(q[2])
    print("".join(S))


if __name__ == '__main__':
    main()