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

int main()
{
    ios::sync_with_stdio(0);
   cin.tie(0),cout.tie(0);
    deque<char> left;
    deque<char> right;
    string s;

    while (cin >> s)
    {
        bool r = true;

        for (char c : s)
        {
            if (c == '[')
            {
                r = true;
            }
            else if (c == ']')
            {
                r = false;
            }
            else
            {
                if (r)
                {
                    left.push_back(c);
                }
                else
                {
                    right.push_back(c);
                }
            }
        }


        while (!left.empty())
        {
            cout << left.front();
            left.pop_front();
        }
        while (!right.empty())
        {
            cout << right.front();
            right.pop_front();
        }
        cout << endl;
    }

    return 0;
}