#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
typedef long long ll;

int main(){
	int n; cin>>n;
	deque<char> que;
	rep(i,n){
		int t; char s;
		cin>>t>>s;
		(t==1?que.push_front(s):que.push_back(s));
	}
	for(auto x: que) cout<<x;
	cout<<endl;
}