procedure main()
   write(image(&ascii) | "failed")
   write(image(&clock) | "failed")
   write(image(&cset) | "failed")
   write(image(&date) | "failed")
   write(image(&dateline) | "failed")
   write(image(&errout) | "failed")
   write(image(&fail) | "failed")
   write(image(&host) | "failed")
   write(image(&input) | "failed")
   write(image(&lcase) | "failed")
   write(image(&level) | "failed")
   write(image(&main) | "failed")
   write(image(&null) | "failed")
   write(image(&output) | "failed")
   write(image(&pos) | "failed")
   write(image(&random) | "failed")
   write(image(&source) | "failed")
   write(image(&subject) | "failed")
   write(image(&time) | "failed")
   write(image(&ucase) | "failed")
   write(image(&version) | "failed")
   write(image(every i := 1 to 50 do write(real(repl("2",i) || "."))) | "failed")
   write(image(every i := 1 to 30 do write((repl("2",i) || ".") + 1)) | "failed")
   write(image(every i := 1 to 50 do write(real(repl("2",i) || ".2"))) | "failed")
   write(image(every i := 1 to 30 do write((repl("2",i) || ".2") + 1)) | "failed")
   write(image(system("echo 1")) | "failed")
   write(image(system("ls -s check.icn")) | "failed")
   write(image(system("test -r  no.file")) | "failed")
   write(image(system("echo hello world")) | "failed")
end