#include <stdio.h>

int main (void)
{
    for (int i = 4; i > 0; i--)
    {
        printf("%*s", 3 * (4 - i), "");

        for (int j = i * i; j > (i - 1) * (i - 1); j--)
        {
            printf("%2d ", j);
        }

        puts("");
    }

}