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



long n,i,sum,nr,t,x,p;
long tip[]={0,1,2,4};
char s[105];
int main()
{


    while (cin.getline(s,103))
    {
        i=0;
        sum=0;
        nr=0;
        n=strlen(s);
        if (s[i]=='u')
            i+=9;
        if (s[i]=='c')
            t=1,i+=5;
        else if (s[i]=='s')
            t=2,i+=6;
        else
            t=3,i+=4;
        while (i<n)
        {
            while (s[i]>='a' && s[i]<='z')
                i++;
            if (s[i]!='[')
                x=1;
            p=1;
            while (s[i]=='[')
            {
                i++;
                x=0;
                while (s[i]!=']')
                {
                    x=x*10+s[i]-'0';
                    i++;
                }
                i++;
                p*=x;
            }
            if (s[i]==',')
                i++;
            sum+=tip[t]*p;
        }
        cout<<sum;
    }

    return 0;
}