I believe your problem is the non-transative nature of the perl || and 'or' operators. in this case you are asking if it is equal to 456 or just 453. 453 of course is never 0 and therefore will be true. Hence printing something. to fix this just add.

if ($value == 456 || $value == 453){
print something;
}
else 
{
print nothing;
}
[download]

That should clear things up.