ref: 2a3ee1c2e3e1ea6477ca8715bf1531dbf34367a1 dir: /testdir/t.re1/
/[a-cg-j1-3]/ { print $0 " matches /[a-cg-j1-3]/" } /[^aeiou]/ { print $0 " matches /[^aeiou]/" }