
open Scanf
open Printf

let flip f x y = f y x

let rec range a b = if a >= b then [] else a :: range (a+1) b

let read_int () = scanf " %d" (fun x -> x)
let rec read_ints n = if n = 0 then [] else let i = read_int () in i :: read_ints (n-1)

let rec for_iter a b f = if a >= b then [] else let x = f a in x :: for_iter (a+1) b f
let rec for_iter_ a b f = if a >= b then () else (f a; for_iter_ (a+1) b f)
let rec for_all_iter a b f = if a >= b then true else f a && for_all_iter (a+1) b f

let list_of_string str = range 0 (String.length str) |> List.map (fun i -> str.[i])
let array_of_string str = Array.init (String.length str) (fun i -> str.[i])

let () =
  let s = read_line () in
  (if for_all_iter 0 (String.length s) (fun i -> s.[i] = s.[String.length s - 1 - i])
  then "Yes" else "No") |> printf "%s\n"
