题解 | #表示数字#

#Jkdi*234*klowe*90*a*3*
s = input()
a = ''
pre_char = ''
for i in s:
    if i.isdigit() and (not pre_char.isdigit()):
        a +='*'
    elif (not i.isdigit()) and (pre_char.isdigit()):
        a += '*'
    a += i
    pre_char = i
if i.isdigit():
        a += '*'
print(a)