#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;
}