o = input()

e = input()



ans = []

n = 0

while n < len(o)+len(e):

  if n % 2 == 0:

    ans.append(o[n//2])

  else:

    ans.append(e[n//2])

  n += 1

print(*ans, sep='')

o=input()

e=input()

n=len(o)

m=len(e)

ans=[]

for i in range(m):

  ans.append(o[i])

  ans.append(e[i])

if n-m==0:

  print(*ans,sep='')

else:

  ans.append(o[n-1])

  print(*ans,sep='')

o = input()
e = input()
ans = []
n = 0
while n < len(o) + len(e):
    if n % 2 == 0:
        ans.append(o[n // 2])
    else:
        ans.append(e[n // 2])
    n += 1
print(*ans, sep="")

o = input()
e = input()
n = len(o)
m = len(e)
ans = []
for i in range(m):
    ans.append(o[i])
    ans.append(e[i])
if n - m == 0:
    print(*ans, sep="")
else:
    ans.append(o[n - 1])
    print(*ans, sep="")

+n = len(o) +m = len(e) -n = 0 -while n < len(o) + len(e): -    if n % 2 == 0: -        ans.append(o[n // 2]) -    else: -        ans.append(e[n // 2]) -    n += 1 -print(*ans, sep="") +for i in range(m): +    ans.append(o[i]) +    ans.append(e[i]) +if n - m == 0: +    print(*ans, sep="") +else: +    ans.append(o[n - 1]) +    print(*ans, sep="")