题解 | #表示数字#

# first we mark all the * to space in case we do the later replace action affect the original *
ipt = input().replace("*", " ")

res = ""
for i in ipt:
    if i.isdigit():
        res += "*" + i + "*"
    else:
        res += i
# strip all the continuious digits
res = res.replace("**","")

# replace back the * from space
res = res.replace(" ", "*")
print(res)