#include <bits/stdc++.h> using namespace std; const int T = 1e5 + 10; int a[T] , b[T]; int k1 = 1 , N = 1 , M = 1; int main() { int n , m; cin >> n >> m; for(int i = 1;i <= n;i++) a[i] = i; for(int i = 1;i <= m;i++) b[i] = i; int x; cin >> x; int p = n , q = m; while(k1 <= x) { cout << a[N] << " " << b[M] << endl; p++; a[p] = a[N]; N++; q++; b[q] = b[M]; k1++; } return 0; }