#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int x=floor(1.08*n);
	if(x==206) cout<<"so-so"<<endl;
	else if(x<206) cout<<"Yay!"<<endl;
	else cout<<":("<<endl;
	return 0;
}

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = s; i < (int)(n); i++)
#define chmax(a, b) a = max(a, b)
#define chmin(a, b) a = min(a, b)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define even(x) (x % 2 == 0 ? true : false)
#define odd(x) (x % 2 ? true : false)

using namespace std;
using ll = long long;
using ull = unsigned long long;
using uint = unsigned;
using pii = pair<int, int>;

//const ll INF = 1e18L + 5;
//const int INF = 1e9 + 5;
//const double pi = 3.14159265358979323846;
//const int mod = 1000000007;
//vector<vector<int>> dp(m, vector<int>(n));

void	solve()
{
	double n;
	cin >> n;

	n *= 1.08;
	int x = (int)n;
	if (x < 206) puts("Yay!");
	else if (x == 206) puts("so-so");
	else puts(":(");
}

int		main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);

	solve();
}

