#include <cstdio>
#include <cstring>
#include <cstdlib>

char line[200];
char c;
char type[50], tlen;
char name[50], nlen;

int mem;

int toInt(int &i) {
    int r=0;
    while (name[i] != ']') {
        r = r*10 + name[i] - '0';
        ++i;
    }
    return r;
}

int parse() {
    int m = 1;
    for (int i=0; i<nlen; ++i) {
        if (name[i] == '[') {
            ++i;
            m *= toInt(i);
        }
    }
    if (m == 0)
        return 1;
    return m;
}

int e;

int main () {

    while (!feof(stdin)) {
        tlen = 0;
        nlen = 0;
        mem = 0;
        while (c != ' ') {
            e = scanf("%c", &c);
            if (e < 0)
                exit(0);
            type[tlen++]=c;
        }
        if (type[0] == 'u') {
            c = 0;
            tlen = 0;
            while (c != ' ') {
                scanf("%c", &c);
                type[tlen++] = c;
            }
        }
        while (c!='\n') {
            nlen = 0;
            memset(name, 0, sizeof(name));
            while (c!=',' && c!='\n') {
                scanf("%c", &c);
                name[nlen++] = c;
            }
            mem += parse();
            if (c == '\n')
                break;
            c = 0;
        }
        if (type[0] == 's')
            mem *= 2;
        if (type[0] == 'i')
            mem *= 4;
        printf("%d\n", mem);
    }

    return 0;
}