#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N; cin >> N;
    int cnt[12] = {};
    rep(i, N) {
        string S; 
        cin >> S;
        if (S == "ne") cnt[0]++;
        if (S == "ushi") cnt[1]++;
        if (S == "u") cnt[2]++;
        if (S == "tatsu") cnt[3]++;
        if (S == "mi") cnt[4]++;
        if (S == "uma") cnt[5]++;
        if (S == "hitsuji") cnt[6]++;
        if (S == "saru") cnt[7]++;
        if (S == "tori") cnt[8]++;
        if (S == "inu") cnt[9]++;
        if (S == "i") cnt[10]++;
        if (S == "tora") cnt[11]++;
    }
    sort(cnt, cnt+12, greater<int>());
    //dump((N/2 + cnt[0] % 2));
    if (cnt[0] > ((N+1)/2)) {
        cout << "NO" << endl;
    } else {
        cout << "YES" << endl;
    }

    return 0;
}