#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<<"("<<x<<","<<i<<")"<<" ";    	
    }
    cout<<endl;
    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<<","<<j<<")"<<" ";	
		    }
	    }
    }
    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;
}