#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
using namespace std;
using ll = long long;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
const ll INF = 1e9;
const ll MOD = 1e9 + 7;


int main(){
    int n;
    cin >> n;

    deque<char> que;
    rep(i, n){
        int t;
        char s;
        cin >> t >> s;
        if(t) que.push_front(s);
        else que.push_back(s);
    }

    for(auto x: que) cout << x; cout << endl;
}