record array(a,b,c,d,e,f,g)
procedure main()
   write(image(x := [array(),table(),write,main,[],&input,1,"abc",'aa',2.0,&null,create 1]) | "failed")
   write(image(x := sort(x)) | "failed")
   write(image(every write(image(!x))) | "failed")
   write(image(e := create 1 to 10) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(e := ^e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(@e) | "failed")
   write(image(*e) | "failed")
   write(image(*e) | "failed")
   write(image(image(e)) | "failed")
   write(image(tab := create {write("entering tab"); 1 | 2 | 3}) | "failed")
   write(image(trim := create {write("entering trim"); @tab | (main @:= tab)}) | "failed")
   write(image(@trim) | "failed")
   write(image(@trim) | "failed")
   write(image(write(image(trim))) | "failed")
   write(image(write(image(tab))) | "failed")
   write(image(write(image(main))) | "failed")
end