#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
using namespace std;
typedef long long ll;
const int mod=998244353;
int main(){
	int n,t;
	char s;
	cin>>n;
	deque<char>deq;
	while(cin>>t>>s){
		if(t==0)
			deq.push_back(s);
		else
			deq.push_front(s);
	}
	for(auto x:deq)
		cout<<x;
	cout<<endl;
}