#include <stdio.h>
#include <string.h>

void main(void){
	const char goodComment[4][100] = {"akai","marui","okii","umai"};
	int n = 0;
	scanf("%d",&n);
	char comment[100] = "a";
	int amaouCount = 0;
	for(int i = 0 ; i < n ; i++){
		int commentCount[4] = {0,0,0,0}; 
		for(int j = 0 ; j < 4 ; j++){
			scanf("%s",comment);
			if(strcmp(comment,goodComment[0]) == 0){
				commentCount[0]++;
			}else if(strcmp(comment,goodComment[1]) == 0){
				commentCount[1]++;
			}else if(strcmp(comment,goodComment[2]) == 0){
				commentCount[2]++;
			}else if(strcmp(comment,goodComment[3]) == 0){
				commentCount[3]++;
			}
		}
		for(int i = 0 ; i < 4;i++){
			if(commentCount[i] != 1){
				break;
			}
			if(i == 3){
				amaouCount++;
			}
		}
	}
	
	printf("%d",amaouCount);
}