#include<bits/stdc++.h>
using namespace std;
int main(){
	long long n;
	string s;
	cin>>n;
	while(n--){
		cin>>s;
		if(s[i-1]=="salty"&&s[i]=="salty"){
			cout<<"Yes"<<endl;
			return 0;
		}
	}
	cout<<"No";
    return 0;
}