$dir= shift || '.';

opendir DIR, $dir or die "Can't open directory $dir: $!\n";

while ($file= readdir DIR ) {   
	next if $file !~/^\w{10,}\d{4,}\.\d{1,}/;
	print "Found a file: $file\n" if $file=~/^\w{10,}\d{4,}\.\d{1,}/;
	 
	}
	print "are you sure that you want to delete $file   'Y/y(es)'  ";
	chop ($answer = <STDIN>);	

unlink $file or die "Can't delete $file: $!\n" if $answer =~m%^Y(es)?$%i;