#include <iostream>
#include <string>
using namespace std;
int main()
{
    string a, b;
    while (cin >> a >> b)
    {
        for (int i = 0, j = b.length() - 1, k = 1; k <= a.length() + b.length(); k++)
        {
            if (k % 2 != 0)
                cout << a[i++];
            else
                cout << b[j--];
        }
        cout << endl;
    }
}