s1=eval(input())



s2=eval(input())



ans = []



for i in range(len(s1)+len(s2)):

    if i%2==0:

        ans.append(s1[i//2])

    else:

        ans.append(s2[i//2])



print((''.join(map(str,ans))))
a = list(eval(input()))

b = list(eval(input()))



ans = []



for i in range(len(a)):

    ans.append(a[i])

    if i < len(b):

        ans.append(b[i])

print((''.join(ans)))
s1 = eval(input())
s2 = eval(input())
ans = []
for i in range(len(s1) + len(s2)):
    if i % 2 == 0:
        ans.append(s1[i // 2])
    else:
        ans.append(s2[i // 2])
print(("".join(map(str, ans))))

a = list(eval(input()))
b = list(eval(input()))
ans = []
for i in range(len(a)):
    ans.append(a[i])
    if i < len(b):
        ans.append(b[i])
print(("".join(ans)))

-s1 = eval(input()) -s2 = eval(input()) +a = list(eval(input())) +b = list(eval(input())) -for i in range(len(s1) + len(s2)): -    if i % 2 == 0: -        ans.append(s1[i // 2]) -    else: -        ans.append(s2[i // 2]) -print(("".join(map(str, ans)))) +for i in range(len(a)): +    ans.append(a[i]) +    if i < len(b): +        ans.append(b[i]) +print(("".join(ans)))