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 Ruby (2.3.3) (judge verdict: Runtime Error)

d =gets.split.map(&:to_i)
if d==25
  puts 'Christmas'

elsif d==24 
    puts 'Christmas Eve'
elsif
    if d==23
      puts 'Christmas Eve Eve'
    
else d==22
        puts 'Christmas Eve Eve Eve'
      end