D:\>perl -dE0

Loading DB routines from perl5db.pl version 1.49_05
Editor support available.

Enter h or 'h h' for help, or 'perldoc perldebug' for more help.

  DB<1> say "$_:\t", $_ =~ /[]abc-]/ for qw/] [ - a/
]:      1
[:
-:      1
a:      1

  DB<2>