O = list(eval(input()))

E = list(eval(input()))+[""]

o = len(O)

x =[]

for i in range(o):

  ans = O[i] + E[i]

  x.append(ans)



print(("".join(x)))
O = list(input())

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

for o,e in zip(O,E):print(o+e, end="")

O = list(eval(input()))
E = list(eval(input())) + [""]
o = len(O)
x = []
for i in range(o):
    ans = O[i] + E[i]
    x.append(ans)
print(("".join(x)))

O = list(input())
E = list(input()) + [""]
for o, e in zip(O, E):
    print(o + e, end="")

-O = list(eval(input())) -E = list(eval(input())) + [""] -o = len(O) -x = [] -for i in range(o): -    ans = O[i] + E[i] -    x.append(ans) -print(("".join(x))) +O = list(input()) +E = list(input()) + [""] +for o, e in zip(O, E): +    print(o + e, end="")