?1???????? ??????????????????????????????????????????????????????? ???????????????9????2???????????????????9????3????????
?2?????? ?????????????????????????????????????????????????????? ?????????15?????18????6?????6?????6????6??????l2?????15????2???2?????2?? ????????????????2????2????????
?3???????????????????????????????????????????????????????????????????????????????????????????????? ????????????10????6????l2????6????20????l0????20?????9?????9????9????????3????6????????l?2?? ???????????????1???????1?????????????
?4???????????????????????????????????????????????????????????????? ???????????????????9???????2??????????????9????9????9????4?????12????2????2???????