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