#include <bits/stdc++.h>
#define pii pair <int,int>
#define pb push_back
#define mp make_pair
#define ll long long
using namespace std;
map<string,ll>M;
string s,t,name;
char S[105];
int i,n;
ll sv,sol,ok,nr;
int main()
{
    M["char"]=1;
    M["short"]=2;
    M["int"]=4;
    while(cin.getline(S,100))
    {
        i=0;
        sol=0;
        s=S;
        t.clear();
        name.clear();
        n=s.size();
        for(;isalpha(s[i])&&i<n;i++)
            t+=s[i];
        i++;
        if(t=="unsigned")
        {
            t.clear();
            for(;isalpha(s[i])&&i<n;i++)
                t+=s[i];
            i++;
        }
        while(i<n)
        {
             for(;isalpha(s[i])&&i<n;i++)
                name+=s[i];
            sv=1;
            ok=0;
            while(s[i]=='[')
            {
                ok=1;
                nr=0;
                i++;
                for(;s[i]>='0'&&s[i]<='9'&&i<n;i++)
                    nr=nr*10+s[i]-'0';
                sv*=nr;
                i++;
            }
            sol+=sv*M[t];
            i++;
        }
        cout<<sol<<'\n';

    }
    return 0;
}