o = eval(input())

e = eval(input())



ans = ''



for i in range(len(o) - 1):

    ans += o[i] + e[i]



ans += o[-1]



if len(o) == len(e):

    ans += e[-1]



print(ans)

o = list(eval(input()))

e = eval(input())



for i in range(len(e)):

    o.insert(i*2+1, e[i])



print((''.join(o)))

o = eval(input())
e = eval(input())
ans = ""
for i in range(len(o) - 1):
    ans += o[i] + e[i]
ans += o[-1]
if len(o) == len(e):
    ans += e[-1]
print(ans)

o = list(eval(input()))
e = eval(input())
for i in range(len(e)):
    o.insert(i * 2 + 1, e[i])
print(("".join(o)))

-o = eval(input()) +o = list(eval(input())) -ans = "" -for i in range(len(o) - 1): -    ans += o[i] + e[i] -ans += o[-1] -if len(o) == len(e): -    ans += e[-1] -print(ans) +for i in range(len(e)): +    o.insert(i * 2 + 1, e[i]) +print(("".join(o)))