#include<bits/stdc++.h>
using namespace std;

void solve(){
	auto f=[&](int i1,int j1,int i2,int j2){
		int di=abs(i1-i2),dj=abs(j1-j2);
		if (di==0&&dj==0) return true;
		if (di==0||dj==0||di==dj) return true;
		return false;
	};
	int h,w;
	cin>>h>>w;
	int py=-1;
	int t=0;
	while (true){
		int x,y;
		cin>>x>>y;
		if (x==0) return;
		if (t==0){
			cout<<1<<" "<<y<<endl;
			py=y;
		}
		else if (t==1){
			cout<<x<<" "<<py<<endl;
		}
		else if (t==2){
			assert(0);
		}
		t++;
	}
}

int main(){
	int t=1;
	cin>>t;
	while (t--) solve();
}