#include <iostream>
#include <string>
using namespace std;

int main(){
    string word1, word2;
    cin>>word1);
    cin>>word2);
   
        string result= "";
        int i = 0;
        while(i<word1.length() && word2.length()){
            result += word1[i];
            result += word2[i];
            i++;
        }
        while(i<word1.length()){
            result += word1[i];
            i++;
        }
        while(i<word2.length()){
            result += word2[i];
            i++;
        }
        cout<<result;
    return 0;
    
}