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+avjeS4quaVsApsZW5ndGggPSAgbGVuICAgICAgKG1zZykKbG93ZXJfY291bnQgPSBzdW0oMSBmb3IgY2ggaW4gbXNnIGlmIGNoLmlzbG93ZXIoKSkKcHJpbnQoIumVv+W6pu+8miIsICBsZW5ndGggKQpwcmludCgi5bCP5YaZ5a2X5q+N5Liq5pWw77yaIiwgICBsb3dlcl9jb3VudCAp