#include <iostream>
using namespace std;



int main() {

	int i_trace_start = 0;
	int i_trace_end = 10;
	int j = -1;
	int step = (i_trace_end > i_trace_start) ? 1 : -1;
	for (int i_trace = i_trace_start; i_trace != i_trace_end; i_trace = i_trace + step, j++) {
		cout << i_trace << "  " << j << endl;
		
	}
		
	// your code goes here
	return 0;
}