s1 = input()
s2 = input()
prefix = ""
p = 0
while s1[p] == s2[p]:
    prefix += s1[p]
    p += 1

suffix = ""
s = -1
while s1[s] == s2[s]:
    suffix += s1[s]
    s -= 1
suffix = suffix[::-1]

stam1 = s1.replace(prefix, "", 1).replace(suffix, "", 1)
stam2 = s2.replace(prefix, "", 1).replace(suffix, "", 1)

if int(len(stam1))>int(len(stam2)):
    place = int(len(stam1)) * " "

    print(f"┏{stam1}┓")
    print(f"{prefix}┫{place}┣{suffix}")
    print(f"┗{stam2}┛")