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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vpii = vector<pii>;
using vi = vector<int>;
using vll = vector<long long>;
using mpii = map<int, int>;
using mpll = map<ll, ll>;
using db = long double;
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define lb lower_bound
#define ub upper_bound
#define make_unique(x) \
sort(all((x))); \
(x).resize(unique(all((x))) - (x).begin())
#define ceil(a, b) ((a) + (b)-1) / (b)
const int mod = (int)1e9 + 7;
const db pi = acos((db)-1);
const int dx[4]{1, 0, -1, 0};
const int dy[4]{0, 1, 0, -1};
#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 42
#endif
/* stuff you should look for:
---------------------------
* special cases (n=1?)
* int overflow, array bounds
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/
struct Time {
int H;
int M;
bool operator<(const Time &other) const {
if (H < other.H) {
return true;
} else if (H == other.H) {
if (M < other.M) {
return true;
} else {
return false;
}
}
return false;
}
Time operator-(const Time &other) const {
Time result;
result.H = H - other.H;
result.M = M - other.M;
if (result.M < 0) {
result.M += 60;
}
return result;
}
};
void solve() {
int n;
Time bedtime;
cin >> n >> bedtime.H >> bedtime.M;
vector<Time> v(n);
bool flag = false;
for (auto &x : v) {
cin >> x.H >> x.M;
if (x.H == bedtime.H && x.M == bedtime.M) {
flag = true;
}
if (x.H < 12) {
x.H += 23;
}
}
if (flag) {
cout << 0 << ' ' << 0 << '\n';
return;
}
Time mn = v[0];
Time mx = {0, 0};
for (int i = 0; i < n; i++) {
Time cur = v[i];
cur.H = cur.H % 24;
if (cur < mn) {
mn = v[i];
}
}
dbg(mn.H, mn.M);
cout << (mn - bedtime).H % 24 << ' ' << (mn - bedtime).M << '\n';
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int tt;
cin >> tt;
while (tt--) {
solve();
}
}
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