#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#include "bits/stdc++.h"
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <list>
#define REP(i,a,b) for(i=a;i<b;++i)
#define rep(i,n) REP(i,0,n)
#define ll long long
#define ull unsigned ll
typedef long double ld;
#define SQR(X)  ( (X)*(X) )
#define CUBE(X) ( (X)*(X)*(X) )

// #define int ll

using namespace std;

bool test = 0;

/* ここからが本編 */

int main(void)
{
  int i,j,k,l;
  int N;
  static int b[15];
  cin >> N;
  rep(i,N) {
    string A;
    cin >> A;
    if(A == "ne")   b[0]++;
    if(A == "ushi") b[1]++;
    if(A == "tora") b[2]++;
    if(A == "u")    b[3]++;
    if(A == "tatsu") b[4]++;
    if(A == "mi")   b[5]++;
    if(A == "uma")  b[6]++;
    if(A == "hitsuji") b[7]++;
    if(A == "saru") b[8]++;
    if(A == "tori") b[9]++;
    if(A == "inu")  b[10]++;
    if(A == "i")    b[11]++;
  }/*
  int type = 0;
  rep(i,12) {
    if(b[i]) type++;
  }*/
  bool ans = true;
  int a = N%2;
  rep(i,12) {
    if(b[i] > N/2+a) ans = false;
  }
  puts(ans?"YES":"NO");
  return 0;
}