ref: 7e6d7d36f83f05f372cfbce43534a2747bfc39c3 dir: /test/t.re1/
/[a-cg-j1-3]/ { print $0 " matches /[a-cg-j1-3]/" } /[^aeiou]/ { print $0 " matches /[^aeiou]/" }