#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    cin >> n;
    vector<int> s(12);
    for(int i = 0; i < n; i++){
        string ss;
        cin >> ss;
        if(ss == "ne") s[0]++;
        else if(ss == "ushi") s[1]++;
        else if(ss == "tora") s[2]++;
        else if(ss == "u") s[3]++;
        else if(ss == "tatsu") s[4]++;
        else if(ss == "mi") s[5]++;
        else if(ss == "uma") s[6]++;
        else if(ss == "hitsuji") s[7]++;
        else if(ss == "saru") s[8]++;
        else if(ss == "tori") s[9]++;
        else if(ss == "inu") s[10]++;
        else s[11]++;
    }
    for(int i = 0; i < 12; i++){
        if(s[i] * 2 > n){
            cout << "NO" << endl;
            return 0;
        }
    }
    cout << "YES" << endl;

    return 0;
}