import re
for _ in range(int(input())):
    n=input()
    if re.match(r"^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9][0-9])$",n):
        print("IPv4")
    elif re.match(r"^([a-fA-F0-9]{1,4}:){7}[a-fA-F0-9]{1,4}$",n):
        print("IPv6")
    else:
        print("Neither")