#include <iostream>
 
using namespace std;
 
const int size = 3;
 
int tab[size][size] = 
{
	{0, 1, 2},
	{0, 1, 2},
	{0, 1, 2}
};
int main(int argc, char** argv)
{
	int rows = (size*2)-1;
 
	int x,y;
 
	for(int i=0; i < rows; i++)
	{
		i >= size ? x = i+1 - size : x=0;
		i >= size ? y = size-1 : y=i;
 
		do
		{
			cout << tab[x][y] << " ";
			x++; y--;
 
			if( x > size-1 || y > size-1)
				break;
		}
		while(x < i+1);
		cout << endl;
	}
	return 0;
}

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