#include <iostream>
#include <list>
#include <string>
using namespace std;

int main() {
    string line;
    while (getline(cin, line)) {   // 一次读一整行，直到 EOF
        list<char> s;
        auto it = s.begin();

        for (char tmp : line) {
            if (tmp == '[') {
                it = s.begin();
            }
            else if (tmp == ']') {
                it = s.end();
            }
            else {
                it = s.insert(it, tmp);
                ++it;
            }
        }

        for (char c : s) cout << c;
        cout << '\n';  // 每行输出一行
    }
    return 0;
}