#include <iostream>
#include <string>
using namespace std;

int main(){
    string s;
    int cnt=0,ans=0;
    while(cin>>s){
        if(s[0]=='+')
            cnt++;
        else if(s[0]=='-')
            cnt++;
        else{
            int j=0;
            while(s[j]!=':')
                j++;
            ans+=(s.size()-j)*cnt;
        }
    }
    cout<<ans<<endl;
    return 0;
}

求助各位大佬！