#include<bits/stdc++.h>
#define ll			long long
#define rep(i,a,b)	for(ll i=a;i<b;i++)
#define vi			vector<ll>
#define pii			pair<ll,ll>
#define hell		1000000007
#define N           100005
#define F 			first
#define S   		second
using namespace std;

string fun(string c)
{
	string s="";
	for(ll i=0;i<c.length();i++)
	{
		if(c[i]==' ')
			continue;
		else
			s+=c[i];
	}
	return s;
}

void solve()
{
	string test;
	getline(cin,test);
	string s;
	s=fun(test);
	ll n=s.length();
	cout<<s<<endl;
	ll p[n]={0};
	stack <pii> st;
	rep(i,0,n){
		if(s[i]=='(')
			st.push({'(',i});
		else if(s[i]==')'){
			if(st.top().S==i-1){
				p[i]=1;
				p[i-1]=1;
			}
			else if((s[st.top().S+1]=='(')&&(s[i-1]==')')){
				p[i]=1;
				p[st.top().S]=1;
			}
			st.pop();
		}
	}
	rep(i,0,n) if(p[i]==0) cout<<s[i];
	return;
}

int main()
{
	int TESTS=1;
	// cin>>TESTS;
	while(TESTS--)
		solve();
	return 0;
}