let iota ?(start=0) ?(step=1) cnt =
  let rec doit i acc =
    if i <= 0 then acc
    else doit (i - 1) (start + step*(i - 1) :: acc) in
  doit cnt []

module S = Set.Make (struct
  type t = int
  let compare = (-)
end)

let () =
  let n = Scanf.scanf "%d " (fun i -> i) in
  let rec doit i acc =
    if i = n then acc
    else
      let a, b, c, d, r =
        Scanf.scanf "%d %d %d %d %s " (fun a b c d r -> a, b, c, d, r) in
      let l = [a; b; c; d] in
      let s =
        if r = "YES" then List.fold_left (fun s e -> S.add e s) S.empty l
        else List.fold_left (fun s e -> S.add e s) S.empty
               (iota 10 |> List.filter (fun e -> not (List.mem e l))) in
      doit (i + 1) (s :: acc) in
  doit 0 []
  |> List.fold_left S.inter (iota 10 |> List.fold_left (fun s e -> S.add e s) S.empty)
  |> S.choose |> Printf.printf "%d\n"