Problem:
Score : 100 points

Problem Statement

In some other world, today is December D-th.

Write a program that prints Christmas if D = 25, Christmas Eve if D = 24, Christmas Eve Eve if D = 23 and Christmas Eve Eve Eve if D = 22.

Constraints

22 \leq D \leq 25

D is an integer.

Input

Input is given from Standard Input in the following format:

D

Output

Print the specified string (case-sensitive).

Sample Input 1

25

Sample Output 1

Christmas

Sample Input 2

22

Sample Output 2

Christmas Eve Eve Eve

Be sure to print spaces between the words.

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

let ch v = if v = "25" then "Christmas" else v;;
let ch2 v = if v = "24" then "Christmas Eve" else v;;
let ch3 v = if v = "23" then "Christmas Eve Eve" else v;;
let ch4 v = if v = "22" then "Christmas Eve Eve Eve" else v;;



print_string " "; print_string (ch4(ch3(ch2(ch(read_line ()))))); print_string "\n";;