/**
  @file 349.cpp
  @title  No.349 干支の置き物 - yukicoder
  @url https://yukicoder.me/problems/no/349
**/

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

typedef long long LL;
#define ALL(obj) (obj).begin(), (obj).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define SZ(x) ((int)(x).size())

#define REPI(i, a, b) for (LL i = LL(a); i < LL(b); ++i)
#define REP(i, N) for (LL i = LL(0); i < LL(N); ++i)
#define REPS(i, N) for (int i = 1; i <= (int)(N); i++)
#define RREP(i, N) for (int i = ((int)(N)-1); i >= 0; i--)
#define RREPS(i, N) for (int i = ((int)(N)); i > 0; i--)

#define chmax(ret, x) ret = max(ret, x)
#define chmin(ret, x) ret = min(ret, x)

#define FILL(x, e) memset(x, e, sizeof(x))
#define ZEROS(x) fill(x, 0)

#define SORT(x) sort(ALL(x))
#define UNIQ(x) x.erase(unique(ALL(x)), x.end())

#define BIT(n) (1LL << (n))

#define OUT(x) cout << (x) << "\n"
#define DEBUG(x) cerr << #x << " : " << x << "\n"
#define DEBUG2(x, y) cerr << "(" << #x << ", " << #y << ") = (" << x << ", " << y << ")\n";

#define PB push_back
#define EB emplace_back
#define MP make_pair
#define MT make_tuple
#define FI first
#define SE second

const int MOD = 1e9 + 7;

void iostream_init() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.setf(ios::fixed);
  cout.precision(12);
}

template <class T>
void show(vector<T>& v) {
  for (uint i = 0; i < v.size(); i++) {
    cout << v[i] << " ";
  }
  cout << "\n";
}

int main() {
  ::iostream_init();

  int N;
  cin >> N;
  map<string, int> m;
  string tmpA;
  REP(i, N) {
    cin >> tmpA;
    m[tmpA]++;
  }

  if (m.size() == 1) {
    OUT("NO");
  } else {
    vector<string> d = {"ne", "ushi", "tora", "u", "tatsu", "mi", "uma", "hitsuji", "saru", "tori", "inu", "i"};
    vector<int> s;
    for (auto i : d) {
      if (m[i] != 0) {
        s.PB(m[i]);
      }
    }

    SORT(s);

    if (s.back() <= (N + 1) / 2) {
      OUT("YES");
    } else {
      OUT("NO");
    }
  }

  return 0;
}