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 3.8.0) (judge verdict: Wrong Answer)

#include<stdio.h>
int main(void)
{
  int A,B;
 
  scanf("%d",&A);
  scanf("%d",&B);
 
    
  if((A=1)&&(B=2)||(A=2)&&(B=1))
  {
    printf("3");
  }
  
   else if((A=3)&&(B=2)||(A=2)&&(B=3))
  {
    printf("1");
  }
  
   else
  {
    printf("2");
  }
  
  return 0;
}