#include<stdio.h>
#include<string.h>
int main()
{
	int i,x,y,len,len1,len2;
	char a[51],b[51];
	while(scanf("%s",a)!=EOF)
	{
		x=0;y=0;
		getchar()
		scanf("%s",f);
		getchar()
		len1=strlen(a);
		len2=strlen(b);
		len=len1+len2;
		for(i=0;i<len2;i++)
		{
			if(i%2==0)
			   printf("%c",a[x++]);
			else
			   printf("%c",b[y++]);
		}
		printf("\n");
		memset(a,0,sizeof(a));
		memset(b,0,sizeof(b));
	}
	return 0;
} 
