module String = struct
  include String

  let fold_left f init str =
    let n = String.length str - 1 in
    let rec doit i acc =
      if i > n then acc
      else doit (i + 1) (f acc str.[i]) in
    doit 0 init

end

let () =
  let dark = read_line () in
  let light = if dark = "oda" then "yukiko" else "oda" in
  let rec doit i s =
    if i = 8 then s
    else
      let l = read_line () in
      let n = String.fold_left (fun s c -> if c <> '.' then s + 1 else s) 0 l in
      doit (i + 1) (s + n) in
  let s = doit 0 0 in
  print_endline (if s mod 2 = 0 then dark else light)