Problem:
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

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;
 
public class Main{
    public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
   
    int A = sc.nextInt();
    int B = sc.nextInt();
    
    //Aが1の場合
    if(A == 1){
      if(B == 2){
      	System.out.println(3);
      }else{
        System.out.println(2);
      }
    }else if(A == 2){
      //Aが２の場合
      if(B == 1){
      	System.out.println(3);
      }else{
        System.out.println(1);
      }
    }else{
      //それ以外(Aが３の場合)
      if(B == 1){
      	System.out.println(2);
      }else{
        System.out.println(1);
      }
    }
      

  }
      
 }