#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  deque<char> s;
  rep(_, n) {
    int t;
    char c;
    cin >> t >> c;
    if (t == 0) {
      s.push_back(c);
    }
    else {
      s.push_front(c);
    }
  }
  for (auto c : s) cout << c;
  cout << endl;
  return 0;
}