#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;

string s;
char d[120];
int k;

int solve(char p[])
{
    int ans=1, prod=0;
    char *q=p;
    q=strchr(q, '[');
    if(q==NULL)
        return 1;
    q++;
    while(*q!='\0')
    {
        if(*q==']')
            ans*=prod, prod=0;

        if(*q!='[' && *q!=']')
        prod=prod*10+*q-'0';
        q++;

    }
    return ans;
}

int main()
{
 //   freopen("in.txt", "r",stdin);
    while(cin>>s)
    {
        if(s=="unsigned")
            cin>>s;
        if(s=="char")
            k=1;
        if(s=="int")
            k=4;
        if(s=="short")
            k=2;

    int ans=0;
        cin>>d;
        char *p, *q;
        p=d;
        do
        {
            q=strchr(p, ',');
            if(q!=NULL)
            *q=NULL;

            ans+=solve(p);
            p=q+1;

        }while(q!=NULL);
        cout<<ans*k<<'\n';
    }



    return 0;
}