#include <bits/stdc++.h>

using namespace std;

​

int main(){

    #ifdef ERFANUL007

        clock_t tStart = clock();

        freopen("input.txt", "r", stdin);

        freopen("output.txt", "w", stdout);

    #endif

​

    string s;

​

    while(getline(cin, s)){

        // cout << s << '\n';

        deque< string > ans;

        string temp = "";

        bool isfront = false;

        for(int i=0; i<s.size(); i++){

            if(s[i] == '['){

                if(isfront) ans.push_front(temp);

                else ans.push_back(temp);

                isfront = true;

                temp = "";

            }

            else if(s[i] == ']'){

                if(isfront) ans.push_front(temp);

                else ans.push_back(temp);

                isfront = false;

                temp = "";

            }

            else temp += s[i];

        }

        if(isfront) ans.push_front(temp);

        else ans.push_back(temp);

        while(!ans.empty()){

            cout << ans.front();

            ans.pop_front();

        }

        cout << '\n';

    }

​

    #ifdef ERFANUL007

        fprintf(stderr, "\n>>> Runtime : %.9fs\n", (double) (clock() - tStart)/CLOCKS_PER_SEC);

    #endif

​

    return 0;

}