ref: 2af227c88bbcf8d6c52eb5b3b3a677d88a281774 dir: /test/t.pp1/
/bwk/,/bwk/ { print $2, $1 } /ava/,/ava/ { print $2, $1 } /pjw/,/pjw/ { print $2, $1 }