#include <bits/stdc++.h>
using namespace std;
int n, a, b, sml, big;
int main() {
	cin >> n >> a >> b;
	int num = abs (a - b);
	    int sum = a + b;
	    for (int i = 1; i <= n; i++)
	        printf ("(%d,%d) ", a, i);
	    cout << endl;
	    for (int i = 1; i <= n; i++) 
	        printf ("(%d,%d) ", i, b);
	        cout << endl;
	    for (int i = 1; i <= n - num; i++) 
	        if (i > 0 && i + num > 0)
	            printf ("(%d,%d) ", i, i + num);
            cout << endl;
		for (int i = n; i >= abs(sum - n); i--) 
		    if (i > 0 && sum - i > 0)
	            printf ("(%d,%d) ", i, sum - i);
	        cout << endl;
	
	return 0;
}