import re

pattern_ipv4 = r'^(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5])(\.(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5])){3}$'
pattern_ipv6 = r'^([\da-f]{,4})(:([\da-f]{,4})){7}$'

for _ in range(int(input())):
    line = input()
    if re.match(pattern_ipv4, line):
        print('IPv4')
    elif re.match(pattern_ipv6, line):
        print('IPv6')
    else:
        print('Neither')