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 C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main (){
    int m,n;
    scanf (" %d %d", &m,&n);

    if (m==1 && n==2){


        printf("3\n");

    }

    else if (m==1 && n==3){


        printf("2\n");

    }

    else if (m==2 && n==1){


        printf("3\n");

    }

    else if (m==2 && n==3){


        printf("1\n");


    }

    else if (m==3 && n==1){


        printf("2\n");

    }

    else if (m==3 && n==2){


        printf("1\n");

    }










    return 0;

}