#include <iostream>
#include <deque>

void solve() {
    std::deque<char> s;

    int n;
    std::cin >> n;
    while (n--) {
        int t;
        char c;
        std::cin >> t >> c;

        if (t == 0) {
            s.push_back(c);
        } else {
            s.push_front(c);
        }
    }

    for (auto c : s) std::cout << c;
    std::cout << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}