#include <stdio.h>
#include <string.h>
int checkA(char *str) {
    while (*str != '\0') {
        if (*str == 'A') {
            return 1;
        }
        str++;
    }
    return 0;
}
int checkB(const char *str) {
    while (*str != '\0') {
        if (*str == 'B') {
            return 1;
        }
        str++;
    }
    return 0;
}
int checkC(const char *str) {
    while (*str != '\0') {
        if (*str == 'C') {
            return 1;
        }
        str++;
    }
    return 0;
}
int checkD(const char *str) {
    while (*str != '\0') {
        if (*str == 'D') {
            return 1;
        }
        str++;
    }
    return 0;
}
int main(int argc, char *argv[]) {
    char a[5];
    char b[5];
    int c;
    int a1 = 0, a2 = 0;
    int total = 0;
    int add = 0;
    int am[4], bm[4];
    scanf("%d", &c);
    int right = 0;
    while (c > 0) {
        scanf("%s", a);
        scanf("%s", b);

        am[0] = checkA(a);
        am[1] = checkB(a);
        am[2] = checkC(a);
        am[3] = checkD(a);
        bm[0] = checkA(b);
        bm[1] = checkB(b);
        bm[2] = checkC(b);
        bm[3] = checkD(b);
        for (int i = 0; i < 4; i++) {
            if (am[i] == 1 && bm[i] == 0) {
                right = 0;
                break;
            }
            if (am[i] == 0 && bm[i] == 1) {
                right = 2;
            }
            if (am[i] == bm[i] && i == 3 && right != 2) {
                right = 1;
            }
        }
        if (right == 1 && strlen(b) > 1) {
            add = 5;
        } else if (right == 1 && strlen(b) == 1) {
            add = 3;
        } else if (right == 2 && strlen(b) > 1) {
            add = 2;
        }
        total += add;
        add = 0;
        right = 0;
        c--;
    }
    printf("%d", total);
    return 0;
}