o, e = [input().rstrip() for i in range(2)] 

ans = ""

for i in range(len(o)):

  ans += o[i]

  if len(e) > i: ans += e[i]

print(ans)
O,E=[list(input().rstrip()) for _ in range(2)]

for i in range(len(E)):

    O.insert(2*i+1,E[i])

print(*O,sep="")

o, e = [input().rstrip() for i in range(2)]
ans = ""
for i in range(len(o)):
    ans += o[i]
    if len(e) > i:
        ans += e[i]
print(ans)

O, E = [list(input().rstrip()) for _ in range(2)]
for i in range(len(E)):
    O.insert(2 * i + 1, E[i])
print(*O, sep="")

-o, e = [input().rstrip() for i in range(2)] -ans = "" -for i in range(len(o)): -    ans += o[i] -    if len(e) > i: -        ans += e[i] -print(ans) +O, E = [list(input().rstrip()) for _ in range(2)] +for i in range(len(E)): +    O.insert(2 * i + 1, E[i]) +print(*O, sep="")