#include <iostream>
using namespace std;
int main(void){
    // Your code here!
    int a, b;
    int sum = 0;
    cin >> a >> b;
    if(b < 23 or 23 < a){
        sum++;
    }
    if(b < 24 or 24 < a){
        sum++;
    }
    if(b < 25 or 25 < a){
        sum++;
    }
    
    cout << sum;
}