题目描述
Takahashi is solving quizzes. He has easily solved all but the last one.
The last quiz has three choices: 1, 2, and 3.
With his supernatural power, Takahashi has found out that the choices A and B are both wrong.
Print the correct choice for this problem.
-----Constraints-----
- Each of the numbers A and B is 1, 2, or 3.
- A and B are different.
-----Input-----
Input is given from Standard Input in the following format:
A
B
-----Output-----
Print the correct choice.
-----Sample Input-----
3
1
-----Sample Output-----
2
When we know 3 and 1 are both wrong, the correct choice is 2.
输入格式
见题面
输出格式
见题面
样例输入
3
1
样例输出
2