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: Wrong Answer)

import java.util.*;

class Main {
    public static void main (String[] args){
        Scanner stdIn = new Scanner(System.in);

        int A = stdIn.nextInt();
        int B = stdIn.nextInt();
        int C = 0;

        if(A == 1){
            if(B==2) C = 3;
            if(C==3) B = 2;
        }else if(A == 2){
            if(B==3) C = 1;
            if(B==1) C = 3;
        }else if(A == 3){
            if(B==1) C = 2;
            if(B==2) C = 1;
        }else{
            System.out.print("Error");
        }
        
        System.out.print(C);

    }
}