#include <bits/stdc++.h>
using namespace std;

struct liu {
    std::string a;
    int b;
} c[100000];

int main() {
    int sum = 0;
    int n, num = 0;
    std::cin >> n;

    for (int i = 1; i <= n; i++) {
        std::string line, lion;
        bool flag = false;
        int aa = 0;
        std::cin >> line >> lion;

        int open = lion.find_first_of('(');
        int close = lion.find_last_of(')');
        std::string a, b;
        a = lion.substr(0, open);
        if (lion[open + 1] == '"')
            b = lion.substr(open + 2, lion.size() - a.size() - 5);
        else
            b = lion.substr(open + 1, lion.size() - a.size() - 3);

        for (int j = 1; j <= num; j++) {
            if (c[j].a == b) {
                flag = true;
                aa = j;
                break;
            }
        }

        if (flag)
            c[++num].a = a, c[num].b = c[aa].b;
        else
            c[++num].a = a, c[num].b = b.size();
        
        if (line == "string")
            sum += c[num].b;
    }

    std::cout << sum << std::endl;

    return 0;
}//全部RE