import re
n = int(input())
for _ in range(n):
    address = input()
    regexv4 = r"^((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])$"
    regexv6 = r"^([a-f0-9]{1,4}:){7}([a-f0-9]{1,4})$"
    if re.match(regexv4, address):
        print("IPv4")
    elif re.match(regexv6, address):
        print("IPv6")
    else:
        print("Neither")