Problem:
Score : 100 points

Problem Statement

It is September 9 in Japan now.

You are given a two-digit integer N. Answer the question: Is 9 contained in the decimal notation of N?

Constraints

10≤N≤99

Input

Input is given from Standard Input in the following format:

N

Output

If 9 is contained in the decimal notation of N, print Yes; if not, print No.

Sample Input 1

29

Sample Output 1

Yes

The one's digit of 29 is 9.

Sample Input 2

72

Sample Output 2

No

72 does not contain 9.

Sample Input 3

91

Sample Output 3

Yes

Solution in OCaml (4.02.3) (judge verdict: Accepted)

open Batteries
(* charのカウント *)
let count_char target str =
  let rec count lst =
    match lst with
    | [] -> 0
    | first :: rest -> if first = target then 1 + count rest else count rest
  in let explode s = List.init (String.length s) (String.get s)
  in count @@ explode str

let _ = 
  let d =read_line () |> count_char '9'
  in (if d != 0 then "Yes" else "No") |> print_endline