#include <iostream>

using namespace std;

int main()
{
  float N;
  cin >> N;
  if ((int)(N * 1.08) < 206)
    cout << "Yay!";
else if ((int)(N * 1.08) == 206)
    cout << "so-so";
 else
   cout << ":(";
}
/*
 * @author: 0x404
 * @Date: 2021-02-20 19:56:33
 * @LastEditTime: 2021-02-20 20:02:58
 * @Description: 
 */

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <iostream>

using namespace std;

int x;

int main(){
    cin >> x;
    if(x % 100 == 0) cout << 100 << endl;
    else {
        for(int i = 1; i <= 100000; i++){
            if((x + i) % 100 == 0){
                cout << i << endl;
                return 0;
            }
        }
    }
    return 0;
}