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