Two things spring to mind: fix your current code - patterns are applied using =~, not = so that would be: 
$value =~ s/kus//;

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Or look for a string of digits in the variable: 
($value) = $value =~ /(\d+)/;

[download]

Makeshifts last the longest.

In reply to Re: regx by Aristotle
in thread regex not working by jumk

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