#include <bits/stdc++.h>
using namespace std;
queue<int> q1, q2;
int a, b, n;
int main()
{
    cin >> a >> b >> n;
    for (int i = 1; i <= a; i++)
        q1.push(i);
    for (int i = 1; i <= b; i++)
        q2.push(i);
    for (int i = 1; i <= n; i++)
    {
        int x = q1.front();
        int y = q2.front();
        cout << x << " " << y << endl;
        q1.pop(), q2.pop();
        q1.push(x), q2.push(y);
    }
    return 0;
}