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)
bXNnPSJoZWxsbyAxMjMgV09STEQiCmxlbmd0aD1sZW4obXNnKQpsb3dlcl9jb3VudCA9IHN1bSgxIGZvciBjaCBpbiBtc2cgaWYgY2guaXNsb3dlcigpKQpwcmludCgi6ZW/5bqmOiIsbGVuZ3RoKQpwcmludCgi5bCP5YaZ5a2X5q+N5Liq5pWwOiIsIGxvd2VyX2NvdW50KQ==