(* /*
C > /) 2> /dev/null & echo hello world!; exit
*       This file is correct input for:
*       sh, cc, pc, f77
*/ main(program)) { puts("hello world!"); /*
*) program main(output);begin writeln('hello world!')end. {
      write( *, '("hello world!")')
      end
*/ return &program; }