#include <math.h>
#include <stdio.h>

int main (void)
{
    for (int i = 16, j, k; j = sqrt(i), k = (j * j == i - 1), i > 0; i--)
        printf("%2d%c%*.s", i, k ? '\n' : ' ', k ? 12 - 3 * j : 0);

    return 0;
}