101480: [AtCoder]ABC148 A - Round One

Memory Limit:256 MB Time Limit:2 S
Judge Style:Text Compare Creator:
Submit:18 Solved:14

Description

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

Input

题意翻译

输入两个不同的正整数 $a,b$,两者都是 $1,2,3$ 中的一个。求剩下的那个正整数。

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