msg="hello 123 WORLD"
length=len(msg)
lower_count=sum(1 for ch in msg if ch. islower())
print("长度:",length)
print("小写字母个数:",lower_count)
bXNnPSJoZWxsbyAxMjMgV09STEQiCmxlbmd0aD1sZW4obXNnKQpsb3dlcl9jb3VudD1zdW0oMSBmb3IgY2ggaW4gbXNnIGlmIGNoLiBpc2xvd2VyKCkpCnByaW50KCLplb/luqbvvJoiLGxlbmd0aCkKcHJpbnQoIuWwj+WGmeWtl+avjeS4quaVsO+8miIsbG93ZXJfY291bnQp