#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)

int main(){
	map<string, int> mp{
		{"ne",0},
		{"ushi",0},
		{"tora",0},
		{"u",0},
		{"tatsu",0},
		{"mi",0},
		{"uma",0},
		{"hitsuji",0},
		{"saru",0},
		{"tori",0},
		{"inu",0},
		{"i",0}
	};
	int n; cin>>n;
	rep(i,n){
		string s; cin>>s;
		if(auto itr=mp.find(s); itr!=end(mp)){
			itr->second++;
		}
	}
  if(n%2!=0) n++;
	bool flg=true;
	for(const auto&[key,value]:mp){
		if(value>n/2) flg=false;
	}
	cout<<(flg?"YES":"NO")<<endl;
}