#include <stdio.h>

const int N = 4;

int main(void)
{
	int i, j, k;
	i = 0; j = 0; k = 0;
	while (i < N) {
		while (j < N) {
			while (k < N) {
				printf("%d,%d,%d\n", i, j, k);
				++k;
			}
			++j; k = j;
		}
		++i; j = i; k = j;
	}
	return 0;
}