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 (Clang 10.0.0) (judge verdict: Accepted)

#include <stdio.h>

int main(){
	int A,B;
	int C = 1;
	int D = 2;
	int E = 3;
	scanf ("%d %d",&A,&B);
	if (A==1 && B== 2){
		printf ("%d\n",E);
	}
	else if (A==2 && B==3){
		printf ("%d\n",C);
	}
	else if (A==1 && B==3){
		printf ("%d\n",D);
	}
	else if (A==2 && B==1){
		printf ("%d\n",E);
	}
	else if (A==3 && B==1){
		printf ("%d\n",D);
	}
	else if (A==3 && B==2){
		printf ("%d\n",C);
	}
	return 0;
}