[relyio]

  "Hello World"

[tyingq]

  echo -e "#include <stdio.h>\nvoid main() {printf(\"Hello world\\\n\");}" | gcc -o ./foo -xc - && ./foo && rm foo

[Sohcahtoa82]

(=<`#9]~6ZY32Vx/4Rs+0No-&Jk)"Fh}|Bcy?`=*z]Kw%oG4UUS0/@-ejc(:'8dc

[mtdewcmu]

  echo "Hello world!" > hello.php
  php hello.php