Re: how to guess mutual frases?

[arkturuz]

You could use regexp to extract names:

my @files = (qw(
  hhk_1sss-(hello).txt
  hhk_2abc-(hello).txt
  hhk_3xyz-(hello).txt
));

my @new_files = map {
  /^.*_(\d[a-z]{3}).*(\.txt)$/; "$1$2"
} @files;