#include <bits/stdc++.h>
using namespace std;
int main(){
    string s1,s2;
    queue<char> que;
    vector<char> vec;
    while(cin>>s1>>s2){
        string res;
        for(char i:s1) que.push(i);
        for(char i:s2) vec.push_back(i);
        while(!vec.empty()){
            res+=que.front();
            res+=vec.back();
            que.pop();
            vec.pop_back();
        }
        cout<<res<<endl;
    }
    return 0;
}