#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,x,y;
	cin>n>>x>>y;
	for(int i=1;i<=n;i++)
	{
		cout<<"("<<i<<","<<y<<")"<<" ";
	}
	cout<<endl;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
		{
			if(i-j=x-y)
			{
				cout<<"("<<i<<","<<")"<<" ";
			}
		}
	}
	cout<<endl;
	for(int i=n;i>=1;i--)
	{
		for(int j=1;j<=n;j++)
		{
			if(i+j=x+y)
			{
				cout<<"("<<i<<","<<j<<")"<<",";
			}
		}
	}
	cout<<endl;
	return 0;
}