text: #include <bits/stdc++.h>
  
  using namespace std;
  using ll = int64_t;
  
  int main() {
      ios_base::sync_with_stdio(false);
      cin.tie(0); cout.tie(0);
  
      string O, E;
      cin >> O >> E;
      const int N = O.size() + E.size();
      for (int i = 0; i < N; ++i) {
          if (i % 2 == 0) {
              cout << O[i/2];
          } else {
              cout << E[i/2];
          }
      }
      cout << endl;
  
      return 0;
  }