#include<iostream>
#include<string>
using namespace std;
int main()
{
	string a,b;
	cin>>a>>b;
	for (int i=0;i<b.length();i++)
		cout<<a[i]<<b[i];
	if (a.length()>b.length())
		cout<<a[a.length()-1];
	return 0;
}