let split_on_char sep s =
  let r = ref [] in
  let j = ref (String.length s) in
  for i = String.length s - 1 downto 0 do
    if String.unsafe_get s i = sep then begin
      r := String.sub s (i + 1) (!j - i - 1) :: !r;
      j := i
    end
  done;
  String.sub s 0 !j :: !r;;

let key = [
  ("Red", 0);
  ("Orange", 1);
  ("Yellow", 2);
  ("Green", 3);
  ("Cyan", 4);
  ("Blue", 5);
  ("Violet", 6);
];;

let find_key a = List.filter (fun (x, _) -> a = x) key;;
let find_value a = List.filter (fun (_, x) -> a = x) key;;
let siyoumae = Array.make 7 0;;
let siyougo = Array.make 7 0;;

let () =
  read_line () |> ignore;
  read_line () |> split_on_char ' ' |>
  List.iter (fun x ->
      let key = (find_key x |> List.hd |> snd) in
      siyoumae.(key) <- siyoumae.(key) + 1);
  read_line () |> split_on_char ' ' |>
  List.iter (fun x ->
      let key = (find_key x |> List.hd |> snd) in
      siyougo.(key) <- siyougo.(key) + 1);
  for x = 0 to 7 do
    if (siyoumae.(x) <> siyougo.(x)) then
      print_string (find_value x |> List.hd |> fst)
    else ()
  done;
  print_newline ();