#include<stdio.h>

#include<string.h>

int main(void){

	int num,i,max=0;

	int a[12] = {};

	char s[8];

	scanf("%d",&num);

	for(i=0;i<num;i++){

		scanf("%s",s);

		if(0 == strcmp(s,"ne")) 	a[0]++;

		if(0 == strcmp(s,"ushi")) 	a[1]++;

		if(0 == strcmp(s,"tora")) 	a[2]++;

		if(0 == strcmp(s,"tatsu")) 	a[3]++;

		if(0 == strcmp(s,"u")) 		a[4]++;

		if(0 == strcmp(s,"mi")) 	a[5]++;

		if(0 == strcmp(s,"uma")) 	a[6]++;

		if(0 == strcmp(s,"hitsuji"))	a[7]++;

		if(0 == strcmp(s,"saru")) 	a[8]++;

		if(0 == strcmp(s,"tori")) 	a[9]++;

		if(0 == strcmp(s,"inu")) 	a[10]++;

		if(0 == strcmp(s,"i")) 	a[11]++;

	}

	for(i=0;i<12;i++){

		if(max<a[i]) max = a[i];

	}

	if((num+1)/2 >= max) printf("YES\n");

	else printf("NO\n");

	return 0;

}