# include <bits/stdc++.h> using namespace std ; queue <int> m , fm ; int main ( ) { int a , b , k ; cin >> a >> b >> k ; for ( int i = 1 ; i <= a ; i ++ ) { m . push ( i ) ; } for ( int i = 1 ; i <= b ; i ++ ) { fm . push ( i ) ; } for ( int i = 1 ; i <= k ; i ++ ) { int a = m . front ( ) , b = fm . front ( ) ; m . pop ( ) ; fm . pop ( ) ; cout << a << ' ' << b << endl ; m . push ( a ) ; fm . push ( b ) ; } return 0 ; }