#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;


int main() {

    int A, B;
    cin >> A >> B;

    int cnt = 3;
    for (int i = 0; i < 3; ++i) {
        if (A <= i + 23 and i + 23 <= B) {
            cnt -= 1;
        }
    }
    cout << cnt << endl;

    return 0;
}