#include <stdio.h>

int main() {
	int n, i, sum = 0, j;
	char s[20];
	scanf("%d", &n);
	getchar();//读取换行
	for (i = 0; i < n; i++) {
	gets(s);
	for (j = 0; j < 13; j++) {
	if (s[j] == 'A')
		sum += 4;
	else if (s[j] == 'K')
		sum += 3;
	else if (s[j] == 'Q')
		sum += 2;
	else if (s[j] == 'J')
		sum += 1;
	else
		sum += 0;
		}
	}
	printf("%d", sum);
	return 0;
}