#include <iostream>
#include <iomanip>   //for setw ("set width")
#include <cstdlib>
using namespace std;

int main()
{
	cout << "10  16\n"
		<< "--  --\n";   //column headings

	for (int i {0}; i <= 27; ++i) {
		cout << dec << setw(2) << i << "  "
			<< hex << uppercase << setw(2) << i << "\n";
	}
	return EXIT_SUCCESS;
}