式：
>>> n1 = 128
>>> n2 = 8
>>> for c in range(0, 256, n1):
... for d in range(0, 256, n2):
... print('172.22.' + str(c) + '.' + str(d), end=', ')
... 結果：
172.22.0.0, 172.22.0.8, 172.22.0.16, 172.22.0.24, 172.22.0.32, 172.22.0.40, 172.22.0.48, 172.22.0.56, 172.22.0.64, 172.22.0.72, 172.22.0.80, 172.22.0.88, 172.22.0.96, 172.22.0.104, 172.22.0.112, 172.22.0.120, 172.22.0.128, 172.22.0.136, 172.22.0.144, 172.22.0.152, 172.22.0.160, 172.22.0.168, 172.22.0.176, 172.22.0.184, 172.22.0.192, 172.22.0.200, 172.22.0.208, 172.22.0.216, 172.22.0.224, 172.22.0.232, 172.22.0.240, 172.22.0.248, 172.22.128.0, 172.22.128.8, 172.22.128.16, 172.22.128.24, 172.22.128.32, 172.22.128.40, 172.22.128.48, 172.22.128.56, 172.22.128.64, 172.22.128.72, 172.22.128.80, 172.22.128.88, 172.22.128.96, 172.22.128.104, 172.22.128.112, 172.22.128.120, 172.22.128.128, 172.22.128.136, 172.22.128.144, 172.22.128.152, 172.22.128.160, 172.22.128.168, 172.22.128.176, 172.22.128.184, 172.22.128.192, 172.22.128.200, 172.22.128.208, 172.22.128.216, 172.22.128.224, 172.22.128.232, 172.22.128.240, 172.22.128.248, >>>