?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????????????????????????????...

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

  21??24

??21??
? 23
22???1??
??24??23??????^?????XX?XY?



? 23
22???1??
?

?????????????????~
?47???21]???48???
????????48?24

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

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