#include<iostream>
#include<fstream>

using namespace std;

int main(){

	ifstream subor;
	subor.open("Graf.txt");

	if (subor.fail()){
		cerr << "Subor sa nepodarilo otvorit";
		exit(1);
	}


	int first;
	int second;

	 while (!subor.eof()){
		  subor >> first;
		  subor >> second;
		  cout<<first<<" -> "<<second<<endl;


	 }


	return 0;
}