#include <bits/stdc++.h>

using namespace std;

int a, Ta, b, Tb;
int h, m;

int main() {
    int t;
    cin >> t;
    while (t--) {
        scanf("%d %d", &a, &Ta);
        scanf("%d %d", &b, &Tb);
        scanf("%d:%d", &h, &m);
        int Time = (h - 5) * 60 + m;
        int ans = 0;
        for (int i = 0; i < 1140; i += b) {
            if (i < Time + Ta && i > Time - Tb) {
                ++ans;
            }
        }
        printf("%d\n", ans);
    }
    return 0;
}