#include<cstdio>
using namespace std;
long double f=1.08;
int n,m;
int main(){
	scanf("%d",&n);
	m=n*f;
	if(m<206)printf("Yay!");
	else if(m==206)printf("so-so");
	else printf(":(");
	return 0;
}
#include<bits/stdc++.h>
using namespace std;
long long n,cnt,sum,ans;
bool u[100005];
int main()
{
	cin>>n;
	ans=n;
	cnt=2;
	while(cnt*cnt<=n)
	{
		if(u[cnt]==1)
		{
			cnt++;
			continue;
		}
		sum=cnt*cnt;
		while(sum<=n)
		{
			if(sum<=100000)u[sum]=1;
			ans--;
			sum*=cnt;
		}
		cnt++;
	}
	cout<<ans;
    return 0;
}