#include <bits/stdc++.h>
#define EPS 1e-9
#define INF 1070000000LL
#define MOD 1000000007LL
#define fir first
#define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++)
#define numa(x,a) for(auto x: a)
#define ite iterator
#define mp make_pair
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define pb push_back
#define pf push_front
#define sec second
#define sz(x) ((int)(x).size())
#define ALL( c ) (c).begin(), (c).end()
#define gcd(a,b) __gcd(a,b)
#define mem(x,n) memset(x,n,sizeof(x))
#define endl "\n"
using namespace std;
template <int POS, class TUPLE> void deploy(std::ostream &os, const TUPLE &tuple){}
template <int POS, class TUPLE, class H, class ...Ts> void deploy(std::ostream &os, const TUPLE &t){ os << (POS == 0 ? "" : ", ") << get<POS>(t); deploy<POS + 1, TUPLE, Ts...>(os, t); }
template <class T,class U> std::ostream& operator<<(std::ostream &os, std::pair<T,U> &p){ os << "(" << p.first <<", " << p.second <<")";return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::vector<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::set<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T, class K> std::ostream& operator<<(std::ostream &os, std::map<T, K> &mp){ int remain = mp.size(); os << "{"; for(auto e: mp) os << "(" << e.first << " -> " << e.second << ")" << (--remain == 0 ? "}" : ", "); return os; }
#define DEBUG1(var0) { std::cerr << (#var0) << "=" << (var0) << endl; }
#define DEBUG2(var0, var1) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG1(var1); }
#define DEBUG3(var0, var1, var2) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG2(var1,var2); }
#define DEBUG4(var0, var1, var2, var3) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG3(var1,var2,var3); }
using ll = long long;



int main()
{
  cin.tie(0);
  ios_base::sync_with_stdio(0);
  const vector <string> s = {"ne","ushi","tora","u","tatsu","mi","uma","hitsuji","saru","tori","inu","i"};
  map <string,int> h;
  rep(i,sz(s)){
    h[s[i]] = i;
  }
  int n[15] = {0};
  int N;
  cin >> N;
  rep(i,N){
    string t;
    cin >> t;
    n[h[t]] += 1;
  }
  int ma = *max_element(begin(n), end(n));
  int ot = N - ma;
  if (ma <= ot + 1) {
    cout << "YES\n";
  }else{
    cout << "NO\n";
  }
  /*
  priority_queue <pair <int,int>, vector <pair <int, int> > > que;
  rep(i,sz(s)){
    que.push(mp(n[i],i));
  }
  vector <int> ans = {-1};
  while(!que.empty()){
    auto t = que.top();
    que.pop();
    if (que.empty()) {
      que.push(t);
      break;
    }
    if (ans.back() != t.sec) {
      ans.pb(t.sec);
      if (t.fir > 1) {
        que.push(mp(t.fir-1, t.sec));
      }
    }else{
      auto t2 = que.top();
      que.pop();
      que.push(t);
      ans.pb(t2.sec);
      if (t2.fir > 1) {
        que.push(mp(t2.fir - 1, t2.sec));
      }
    }
  }
  auto t = que.top();
  //DEBUG1(t);
  //DEBUG1(ans);
  if (t.fir == 0 || (t.fir == 1 && ans.back() != t.sec)) {
    cout << "YES\n";
  }else{
    cout << "NO\n";
  }
  */
  return 0;
}