echo '11 12 13 14
21 22 23 24
31 32 33 34' |
awk '{ for (i=1; i<=NF; i++) print i, NR, $i}' |
sort -n |
awk ' NR>1 && $2==1 { print "" }; { printf "%s ", $3 }; END { print "" }'
ZWNobyAnMTEgMTIgMTMgMTQKMjEgMjIgMjMgMjQKMzEgMzIgMzMgMzQnIHwKYXdrICd7IGZvciAoaT0xOyBpPD1ORjsgaSsrKSBwcmludCBpLCBOUiwgJGl9JyB8CnNvcnQgLW4gfAphd2sgJyBOUj4xICYmICQyPT0xIHsgcHJpbnQgIiIgfTsgeyBwcmludGYgIiVzICIsICQzIH07IEVORCB7IHByaW50ICIiIH0n