#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
	ll n,b,c;
	cin>>n>>b>>c;
	int a[b][c];
	for(ll i=1;i<=n;i++)
	{
		cout<<"("<<b<<","<<i<<")"<<" ";
	}
	cout<<endl;
	for(ll i=1;i<=n;i++)
	{
		cout<<"("<<i<<","<<c<<")"<<" ";
	}
	cout<<endl;
	for(ll i=1;i<n;i++)
	{
		ll j=i+1;
		cout<<'('<<i<<','<<j<<')'<<" ";
	}
	cout<<endl;
	for(ll i=n;i>0;i--)
	{
		ll j=n+1-i;
		cout<<'('<<i<<','<<j<<')'<<" ";
	}
	cout<<endl;
}