#include <cstdio>
#include <iostream>
using namespace std;

struct Time {
    int year, month, date, h, min, s;
} a, b;

void read(Time* x) { scanf("%d/%d/%d %d:%d:%d", &x->year, &x->month, &x->date, &x->h, &x->min, &x->s); }

int r(Time* x) {
    if (x->year % 4 == 0 && x->year % 100 != 0 || x->year % 400 == 0)
        return 1;
    return 0;
}

int r(int x) {
    if (x % 4 == 0 && x % 100 != 0 || x % 400 == 0)
        return 1;
    return 0;
}

int days(Time* x) {
    int m[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    if (x->month != 2)
        return m[x->month];
    return m[2] + r(x);
}

int days(Time* x, int n) {
    int m[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    if (n != 2)
        return m[n];
    return m[2] + r(x);
}

bool check(Time* x) {
    if (x->month > 12)
        return false;
    if (x->year == 0 || x->month == 0 || x->date == 0)
        return false;
    if (x->date > days(x))
        return false;
    if (x->h >= 24 || x->min >= 60 || x->s >= 60)
        return false;
    return true;
}

int num(Time* x) {
    int sum = 0;
    for (int i = 1; i < x->month; i++) sum += days(x, i);
    sum += x->date;
    return sum;
}

int cmp(Time* a, Time* b) {
    if (a->year > b->year)
        return 1;
    if (a->year < b->year)
        return -1;
    if (a->month > b->month)
        return 1;
    if (a->month < b->month)
        return -1;
    if (a->date > b->date)
        return 1;
    if (a->date < b->date)
        return -1;
    if (a->h > b->h)
        return 1;
    if (a->h < b->h)
        return -1;
    if (a->min > b->min)
        return 1;
    if (a->min < b->min)
        return -1;
    if (a->s > b->s)
        return 1;
    if (a->s < b->s)
        return -1;
    return 0;
}

int main() {
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        read(&a);
        read(&b);
        if (!check(&a) || !check(&b)) {
            cout << "-1" << endl;
            continue;
        }
        if (cmp(&a, &b) == 1) {
            Time t;
            t = a;
            a = b;
            b = t;
        }
        long long ans = 0;
        for (int j = a.year; j < b.year; j++) ans += 365 + r(j);
        ans += num(&b) - num(&a);
        ans = ans * 24 + b.h - a.h;
        ans = ans * 60 + b.min - a.min;
        ans = ans * 60 + b.s - a.s;
        cout << ans << endl;
    }
    return 0;
}