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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

/**
 *    author:  FromDihPout
 *    created: 2020-05-30
**/

#include <bits/stdc++.h>
using namespace std;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    long long n;
    cin >> n;
    if (n & 1) {
        cout << 0 << '\n';
    }
    else {
        long long cnt = 0, denom = 10;
        while (denom <= n) {
            cnt += n / denom;
            denom *= 5;
        }
        cout << cnt << '\n';
    }
}