#include<iostream>
#include<math.h>
#include<string>
#include<sstream>
#include <bits/stdc++.h>
#include <cstdlib>
using namespace std;
int main()
{
	int n;

	cin>>n;

	double value=n*1.08;

	if(floor(value)<206)
	{
		cout<<"Yay!"<<"\n";
	}
	else if(floor(value)>206)
	{
		cout<<":("<<"\n";
	}
	else if(floor(value)==206){
		cout<<"so-so"<<"\n";
	}
	
}
#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n - 1); i >= 0; i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) int(x.size())
using namespace std;
using ll = long long;
const int INF = 1e9;
const ll LINF = 1e18;
template <class T>
bool chmax(T& a, const T& b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
bool chmin(T& a, const T& b) {
    if (b < a) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
vector<T> make_vec(size_t a) {
    return vector<T>(a);
}
template <class T, class... Ts>
auto make_vec(size_t a, Ts... ts) {
    return vector<decltype(make_vec<T>(ts...))>(a, make_vec<T>(ts...));
}
template <typename T>
istream& operator>>(istream& is, vector<T>& v) {
    for (int i = 0; i < int(v.size()); i++) {
        is >> v[i];
    }
    return is;
}
template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    for (int i = 0; i < int(v.size()); i++) {
        os << v[i];
        if (i < sz(v) - 1) os << ' ';
    }
    return os;
}
int main() {
    int n;
    cin >> n;
    n *= 108;
    n /= 100;
    cout << (n < 206 ? "Yay!\n" : n == 206 ? "so-so\n" : ":(\n");
}