ref: c0f4e97e4561ff42544e92512bbaf3d7d1f6a671 dir: /testdir/t.re1/
/[a-cg-j1-3]/ { print $0 " matches /[a-cg-j1-3]/" } /[^aeiou]/ { print $0 " matches /[^aeiou]/" }