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