#include <iostream>
int main()
{
    int canday = 3;
    int A = 0;
    int B = 0;
    std::cin >> A;
    std::cin >> B;
    if(A <= 23 && B >= 23)
    {
        canday--;
    }
    if(A <= 24 && B >= 24)
    {
        canday--;
    }
    if(A <= 25 && B >= 25)
    {
        canday--;
    }
    std::cout << canday;
    return 0;
}