#include<bits/stdc++.h> using namespace std; int l,o,m; queue man; queue noman; int main(){ cin>>l>>o; cin>>m; for(int i=1;i<=l;i++){ man.push(i); } for(int i=1;i<=o;i++){ noman.push(i); } for(int j=1;j<=m;j++){ cout<<man.front()<<' '<<noman.front()<<endl; man.push(man.front()); man.pop(); noman.push(noman.front()); noman.pop(); }

return 0;

}