#include <stdio.h>

main() {

char s1[50], s2[50];
char *p1, *p2;

fgets(s1,48,stdin);
fgets(s2,48,stdin);

p1=s1;    p2=s2;

while( (*p1 != '\n') && (*p2 != '\n') ) {
	putchar(*p1);
	putchar(*p2);
	p1++; p2++;
	}

while(*p1 != '\n') {putchar(*p1); p1++;}
while(*p2 != '\n') {putchar(*p2); p2++;}
putchar('\n');

}