//Strings with iomanip
#include <iostream>
#include<string>
using namespace std;
void main()
{ string soc = "123456789";
  if (soc.length() != 9)
    cout<<"wrong length\n";
  else
    for(int i=0;i<9;i++)
	{ cout<<soc[i];
      if(i==2 ||i==4) cout<<"-";
	} //each digit
}//main