#include <iostream>
#include <tuple>

using namespace std ;


// 1. Base Case: Called when only one argument is left
template <typename T>
T print_all(T last) {
    cout << last << endl;
    return last;
}

// 2. Recursive Case: Unpacks the first item and passes the rest forward
template <typename First, typename... Rest>
void print_all(First first, Rest... rest) {
    cout << first << ", ";

    // Recursive call with the remaining parameter pack
    print_all(rest...);
}


int main()
{
      print_all( 1 , 2 ) ;

      return 0;
}