264 val r = ("a" | "ab") ~ ("bcd" | "c")

   264 val r1 = ("a" | "ab") ~ ("bcd" | "c")

   265 println(lexing(r, "abcd"))

   265 println(lexing(r1, "abcd"))

   266 println(values(r).mkString("\n"))

   266 println(values(r1).mkString("\n"))

   267 println(values(r).map(flatten).mkString("\n"))

   267 println(values(r1).map(flatten).mkString("\n"))

   268 

   269 val r2 = ("" | "a") ~ ("ab" | "b")

   270 println(lexing(r2, "ab"))

   271 println(values(r2).mkString("\n"))

   272 println(values(r2).toList.map(flatten).mkString("\n"))

   273 

   274