msg = "hello 123 WORLD"
#统计长度和小写字母个数
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)
bXNnID0gImhlbGxvIDEyMyBXT1JMRCIKI+e7n+iuoemVv+W6puWSjOWwj+WGmeWtl+avjeS4quaVsApsZW5ndGggPWxlbihtc2cpCmxvd2VyX2NvdW50ID0gc3VtKDEgZm9yIGNoIGluIG1zZyBpZiBjaC5pc2xvd2VyKCkpCnByaW50KCLplb/luqbvvJoiLGxlbmd0aCkKcHJpbnQoIuWwj+WGmeWtl+avjeS4quaVsO+8miIsbG93ZXJfY291bnQp