题解 | 表示数字

def func():
    s = input()

    res = []
    nums = "0123456789"
    check = False
    for i in s:
        if i in nums:
            if not check:
                res.append("*")
                check = True
        else:
            if check:
                res.append("*")
                check = False
        
        res.append(i)

    if check:
        res.append("*")

    print(''.join(res))


if __name__ == "__main__":
    func()