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

int main() {
	int N;
	cin >> N;

	deque<char> deq;
	for (int i = 0; i < N; i++) {
		int T;
		char S;
		cin >> T >> S;

		if (T == 0) deq.push_back(S);
		if (T == 1) deq.push_front(S);
	}

	for (int i = 0; i < N; i++) {
		cout << deq.at(i);
		if (i == N - 1) cout << endl;
	}
}