#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <math.h>

#define N 10000000

int a[N], seen[N], dseen[N];

int
main(int ac, char **av)
{
	int n, d, i;
	double slope;

	a[1] = 1;
	for (n = 2; n <= 100000; n++) {
		for (i = 2; ; i++) {
			if (seen[i]) {
				continue;
			}
			d = i - a[n-1];
			if (d < 0) {
				d = -d;
			}
			if (dseen[d]) {
				continue;
			}
			a[n] = i;
			slope = (double)i/n;
			printf("%d %d %g %g\n", n, i, slope, floor(slope));
			dseen[d] = seen[i] = 1;
			break;
		}
	}
	return 0;
}