#include<bits/stdc++.h>
using namespace std;
string s;
int main(){
	cin >> s;
	for(int i = 0;i < s.size();i++){
		if(s[i] == '(' or s[i] == ')'){
			if(s[i] == '(' and s[i+1] == ')'){
				cout << '(' << ')';
				i++;
				continue;
			}
			else cout << '(' << ')' ;
		} else if(s[i] == '[' or s[i] == ']'){
			cout << '[' << ']' ;
		}
	}
	return 0;
}

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