#include<iostream>
#include<cstring>
using namespace std;
//ifstream cin("date.in");
//ofstream cout("date.out");
char a[128],*p;
int k,sz,sol,nr;
int main()
{
    while (cin.getline(a,128))
    {
        sol=0, nr=1, k=0;
        k=strlen(a);
        a[k]=',';
        a[k+1]=0;
        p=a;
        if (*p=='u')
        {
            while (*p!=' ') ++p;
            if (*p==' ') ++p;
        }
        if (*p=='c')
        {
            sz=1;
            while (*p!=' ') ++p;
            if (*p==' ') ++p;
        }
        else
        {
            if (*p=='s')
            {
                sz=2;
                while (*p!=' ') ++p;
                if (*p==' ') ++p;
            }
            else
            {
                sz=4;
                while (*p!=' ') ++p;
                if (*p==' ') ++p;
            }
        }
        while (*p)
        {
            k=0;
            while (*p!='[' && *p!=',') ++p;
            if (*p==',')
            {
                sol+=sz;
                ++p;
                continue;
            }
            else
            {
                nr=1;
                while (*p=='[')
                {
                    ++p, k=0;
                    while ('0'<=*p && *p<='9')
                        k=k*10+*p-'0', ++p;
                    nr*=k;
                    ++p;
                }
                sol+=nr*sz;
                while (*p==',') ++p;
            }
        }
        cout<<sol<<"\n";
    }
    return 0;
}