#!/usr/bin/env python3



def main():

    a = input()

    b = input()

    for i in range(len(a)):

        print(a[i], end="")

        if i < len(b):

            print(b[i], end="")

    print()





if __name__ == "__main__":

    main()

#!/usr/bin/env python3



def main():

    a = list(input())

    b = list(input()) + [""]

    for i in range(len(a)):

        print(a[i], end="")

        print(b[i], end="")





if __name__ == "__main__":

    main()

#!/usr/bin/env python3
def main():
    a = input()
    b = input()
    for i in range(len(a)):
        print(a[i], end="")
        if i < len(b):
            print(b[i], end="")
    print()


if __name__ == "__main__":
    main()

#!/usr/bin/env python3
def main():
    a = list(input())
    b = list(input()) + [""]
    for i in range(len(a)):
        print(a[i], end="")
        print(b[i], end="")


if __name__ == "__main__":
    main()

-    a = input() -    b = input() +    a = list(input()) +    b = list(input()) + [""] -        if i < len(b): -            print(b[i], end="") -    print() +        print(b[i], end="")