#include<stdio.h>
char * insert(char *p1,char *p2)
{
char temp[1024]={0},*p=temp
while(true){
if(*p1=='\0' &&*p2=='\0') break
if(*p1!='\0'){*p=*p1p++p1++}
if(*p2!='\0'){*p=*p2p2++}
p++
}
return temp
}
main()
{
char s1[256]={0},*p1=s1
char s2[256]={0},*p2=s2
char *p
scanf("%s",p1)
scanf("%s",p2)
p=insert(p1,p2)
printf("%s\n",p)
}