Contest Duration: - (local time) (100 minutes) Back to Home
A - Round One /

Time Limit: 2 sec / Memory Limit: 1024 MB

### 問題文

この問題は、答えが 1,2,3 のいずれかである 3 択問題です。

この問題の答えを出力してください。

### 制約

• A,B1,2,3 のいずれか
• AB は異なる

### 入力

A
B


### 入力例 1

3
1


### 出力例 1

2


1,2,3 のうち、3 でも 1 でもないのは 2 です。

### 入力例 2

1
2


### 出力例 2

3


Score: 100 points

### Problem Statement

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 1

3
1


### Sample Output 1

2


When we know 3 and 1 are both wrong, the correct choice is 2.

### Sample Input 2

1
2


### Sample Output 2

3