#include <iostream>
#include <vector>
#define ll long long
using namespace std;

ll q, m, a, x, b, y;
vector<ll> sol;

int main()
{
    cin >> q >> m;
    for (int i = 1; i <= q; ++i)
    {
        cin >> a >> x >> b >> y;
        ll napok_szama = b - a;
        ll ido = napok_szama * 24 - x + y;
        if (ido % m != 0)
        {
            sol.push_back(ido / m);
        }
        else
        {
            sol.push_back(ido / m - 1);
        }
    }

    for (auto &e : sol)
    {
        cout << e << endl;
    }

    return 0;
}