#include <bits/stdc++.h>

using namespace std;

struct HuoWu {
    string name;
    int shouyi;
    int count;
};

int main() {
    //输入+输出重定向
    //freopen("../x.in", "r", stdin);
    //freopen("../x.out", "w", stdout);

    int n, k;
    cin >> n >> k;
    unordered_map<string, HuoWu> _map;
    for (int i = 0; i < n; ++i) {
        HuoWu h;
        cin >> h.name >> h.shouyi >> h.count;
        _map[h.name] = h;
    }

    bool success = true;
    int shouyi = 0;
    for (int i = 0; i < k; ++i) {
        HuoWu h;
        cin >> h.name >> h.count;
        if (_map[h.name].count >= h.count) {
            _map[h.name].count = _map[h.name].count - h.count;
            shouyi += _map[h.name].shouyi * h.count;
        } else {
            success = false;
            cout << "-" << i + 1 << endl;
        }
    }
    if (success) {
        cout << shouyi << endl;
    }

    //关闭文件
    //fclose(stdin);
    //fclose(stdout);
    return 0;
}