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)
    {
        int count = 0;
        boolean sw = false;
        int max = Integer.MIN_VALUE;
        int min = Integer.MAX_VALUE;
        double dMax = Double.MIN_VALUE;
        double dMin = Double.MAX_VALUE;
        //
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int b = sc.nextInt();

        if (n == 1 && b == 2) System.out.println(3);
        else if (n == 1 && b == 3) System.out.println(2);
        else if (n == 2 && b == 3) System.out.println(1);
        else if (n == 2 && b == 1) System.out.println(3);
        else if (n == 3 && b == 1) System.out.println(2);
        else if (n == 3 && b == 2) System.out.println(1);

        sc.close();
    }

    public class Pair<F,S>
    {
        private final F first;
        private final S second;

        Pair(F first,S second)
        {
            this.first = first;
            this.second = second;
        }

        public void print() { System.out.println("("+this.first+","+this.second+")"); }

        //get
        public F first() {return this.first;}
        public S second() {return this.second;}

        @Override
        public boolean equals(Object object)
        {
            if (object instanceof Pair)
            {
                Pair pair = (Pair)object;
                return this.first==pair.first && this.second==pair.second;
            }else
            {
                return false;
            }
        }

        @Override
        public int hashCode()
        {
            return Objects.hash(first,second);
        }
    }
}