4.3BSD/usr/contrib/icon/book/04/words1.icn

procedure main()
   wchar := &lcase ++ &ucase ++ '\'-'
   while line := read() do {
      i := 1
      while j := upto(wchar,line,i) do {
         i := many(wchar,line,j)
         write(line[i:j])
         }
      }
end