x = [ 
        [ 1 , 2 , 3 ] , 
        [ 4 , 5 , 6 ] , 
        [ 7 , 8 , 9 ] 
    ]

for i in ( 0..2 ) do
	for j in ( 0..2 ) do
		if i == ( 2-j ) 
			x[ i ][ j ] = 0
		end
	end
end

for i in ( 0..2 ) do
        for j in ( 0..2 ) do
                printf( "%d " , x[ i ][ j ] )
        end
        printf( "\n" );
end