#include <iostream>
#include <string.h>

using namespace std;

int main() {
	char s1[99], s2[99], s3[99];
	int i, j, k, s3size;

	gets(s1);
	gets(s2);

	for(i = 0, j = 0, k = 0; s1[j] != '\0' || s2[k] != '\0'; i++){
		if(i%2){
			s3[i] = s2[k];
			k++;
		}else{
			s3[i] = s1[j];
			j++;
		}
	}
	i++;
	s3[i] = '\0';


	for(i = 0; s3[i] != '\0'; i++){
		cout<<s3[i];
	}




	return 0;
}