"""
Checking valid Ip Address.
A valid IP address must be in the form of A.B.C.D,
where A,B,C and D are numbers from 0-254
for example: 192.168.23.1, 172.254.254.254 are valid IP address
             192.168.255.0, 255.192.3.121 are Invalid IP address
"""


def check_valid_ip(ip: str) -> bool:
    """
    print "Valid IP address" If IP is valid.
    or
    print "Invalid IP address" If IP is Invalid.

    >>> check_valid_ip("192.168.0.23")
    True

    >>> check_valid_ip("192.255.15.8")
    False

    >>> check_valid_ip("172.100.0.8")
    True

    >>> check_valid_ip("254.255.0.255")
    False
    """
    ip1 = ip.replace(".", " ")
    list1 = [int(i) for i in ip1.split() if i.isdigit()]
    count = 0
    for i in list1:
        if i > 254:
            count += 1
            break
    if count:
        return False
    return True


if __name__ == "__main__":
    ip = input()
    output = check_valid_ip(ip)
    if output is True:
        print(f"{ip} is a Valid IP address")
    else:
        print(f"{ip} is an Invalid IP address")