UVa 11988

#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;
}