#include <bits/stdc++.h>

using namespace std;

int main() {
    int m, n, k;
    cin >> m >> n >> k;
    queue<int> man;
    queue<int> woman;
    //男士人数 m
    for (int i = 0; i < m; ++i) {
        man.push(i + 1);
    }
    //女士人数 n
    for (int i = 0; i < n; ++i) {
        woman.push(i + 1);
    }
    //输出结果
    for (int i = 0; i < k; ++i) {
        int a = man.front();
        int b = woman.front();
        cout << a << " " << b << endl;
        man.pop();
        woman.pop();
        man.push(a);
        woman.push(b);
    }
    return 0;
}