let ``No.431 死亡フラグ``()=

  stdin.ReadLine().Split(' ')
  |> Array.map int
  |> fun args ->
    match args.[3] with
    | 1 -> "SURVIVED"
    | 0 -> if Array.sum [| args.[0] ; args.[1]; args.[2] |] > 1 then "DEAD"
           else "SURVIVED"
  |> stdout.WriteLine
  
``No.431 死亡フラグ``()