import re
N= int(input())

for i in range(N):
    s = input()
    try:
        regex = re.findall(r"^([\da-f]{,4}\:){7}[\da-f]{,4}$", s)
        if regex:
            print("IPv6")
        else:
            regex = re.findall(r"^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])$", s)
            if regex:
                print("IPv4")
            else:
                print("Neither")
    except Exception as e:
        pass