#include <iostream>

#include <list>

#include <string>

using namespace std;

int main()

{

	ios::sync_with_stdio(false);

	cin.tie(nullptr);

	cout.tie(nullptr);

	string input;

	while (getline(cin, input)) {

		list<char> line;

		auto it = line.begin();

		for (auto& i : input) {

			if (i == '[') it = line.begin();

			else if (i == ']') it = line.end();

			else line.emplace(it, i);

		}

		for (auto& i : line) cout << i;

		cout << "\n";

	}

	return 0;

}