#include <string>
#include <iostream>
using namespace std;

int main()
{
	double n;

	cin >> n;
	n *= 1.08;
	n = (int)(n);

	if (n == 206)
		cout << "so-so" << endl;
	else if(n < 206)
		cout << "Yay!" << endl;
	else
		cout << ":(" << endl;
}
#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
#define repi(i,a,b) for(int i=int(a);i<int(b);++i)
#define rrep(i,n) for(int i = (n-1);i>=0;--i)
#define all(x) (x).begin(), (x).end()
using namespace std;
typedef long long ll;
typedef long double ld;
const int INF=1<<30;
//const ll INF=1LL<<60;
 
int main() {

    int n;
    cin >> n;

    double ans = (double)n*1.08;

    int k = ans;

    if(k<206)   cout<<"Yay!"<<endl;
    else if(k==206) cout<<"so-so"<<endl;
    else    cout<<":("<<endl;


    
 return 0;
}