#include <bits/stdc++.h>

using namespace std;
int m, q, ossz;

struct bencu
{
    int nap;
    int ora;
}a, b;


int main() {
	
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>q>>m;
    long long s=0;
    for(int i=1;i<=q;i++)
    {
        s=0;
        cin>>a.nap>>a.ora>>b.nap>>b.ora;
        s+=(b.nap-a.nap-1)*24;
        if(a.ora<=b.ora)
        {
            s+=24;
            s+=b.ora-a.ora;
        }
        else
        {
            s+=24-a.ora+b.ora;
        }
        if(s%m==0)cout<<s/m-1<<endl;
        else cout<<s/m<<endl;
    }
    
    

    return 0;
}