#include <bits/stdc++.h>
using namespace std;

int main()
{
    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r+", stdin);
    freopen("output.txt", "w+", stdout);
    #endif
  vector<pair<int,int>>v;
  v.push_back(make_pair(1,2));
  v.push_back(make_pair(2,3));
  v.push_back(make_pair(3,4));
  for(int p:v)
    cout<<p.first<<","<<p.second<<endl;
}