#include <bits/stdc++.h>
#include "testlib.h"
using namespace std;
using ll = long long;
const ll MIN_N = 1;
const ll MAX_N = 200'000;
const ll MIN_R = 1;
const ll MAX_R = 1'000'000'000;

int main(){
	registerValidation();
	ll N = inf.readLong(MIN_N, MAX_N);
	inf.readEoln();
	for (int i=0; i<N; i++){
		ll r1 = inf.readLong(MIN_R, MAX_R);
		inf.readSpace();
		ll r2 = inf.readLong(MIN_R, MAX_R);
		assert(r1 < r2);
		inf.readEoln();
	}
	inf.readEof();
}