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 C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
#define     __        ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define     pi        acos(-1)
#define     ll        long long int
#define     f0(n)     for(int i=0;i<n;i++)
#define     mem(a)    memset(a,0,sizeof(a))
#define     mems(a)   memset(a,-1,sizeof(a))

int main()
{
   /* #ifndef ONLINE_JUDGE
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif  */
     __

     int d;
     cin>>d;
     if(d==22) cout<<"Christmas Eve Eve Eve"<<endl;
     else if(d==23) cout<<"Christmas Eve Eve\n";
     else if(d==24) cout<<"Christmas Eve\n";
     else cout<<"Christmas\n";

    return 0;
}