<>;
for(<>){
	/ /;
	$x=$`/15;
	$y=$'/15;
	if(!grep{(($_[$y+$_/5][$x+$_%5][0]//-20)-$`)**2+($_[$y+$_/5][$x+$_%5][1]-$')**2<400}0..24){
		$_[$y+2][$x+2]=[$`,$'];
		++$z
	}
}
print$z