#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	for(int i=1;i<=a;i++){
		cout<<"("<<b<<","<<i<<")"<<" ";
	}
	cout<<endl;
	for(int i=1;i<=a;i++){
		cout<<"("<<i<<","<<c<<")"<<" ";
	}
	cout<<endl;
	int min,max;
	if(b>c){
		max=b;
		min=c;
	}else{
		max=c;
		min=b;
	}
	for(int i=1;i<=a-(max-min);i++){
		if(max==b){
			cout<<"("<<i+max-min<<","<<i<<")"<<" ";
		}else if(max==c){
			cout<<"("<<i<<","<<i+max-min<<")"<<" ";
		}
	}
	cout<<endl;
	for(int i=4;i>=1;i--){
		if(max+min-i>0&&max+min-i<=4){
			cout<<"("<<i<<","<<max+min-i<<")"<<" ";
		}
	}
}