?N

????XXX????
????XXX????X???????46,XX????????X??47,XxX?X48,XxxX????X??????50,XxxxX?????????
???????????1250????X??^??????????????????????????????
?XYY????
21??

Turner? :
?45X
???????????????????????????????
??????

Down??
??21??
?47XX(XY),
????????????4060?????????????????????????????????????????
??????????????????

13??
?47+13
????????????F???????????????????????????????????????????????2/3????????????????12???F???80????????????????????????????...

1??
(1)???  ???????????????????????????????X????1251?26??10?????X?????
(2)??Y  ????????????????????????????P?23??
(3)Y??  Y????????Y???
2?
(1)??  ????5????2?????72???????????????
(2)?????????
3??????02????20?????3713?????????????
??????^???????????????????X???...

????
???{Y??}
???XY
??XX
??^??XYY
??XXX
?~~~~~~~~Y??? Y???

???????
??
? ???
???{Y??}

???XY
??XX
??^??XYY
??XXX
?~~~~~~~~Y??? Y???