?? ??????3?????50?? ????????
????:1?51???:??????????
2????????
3??????????????
4???????
5???????????
??6???????18?? (???????? ????????????????????)???????18??????,?3??50???????18????????5??????,?????????????
?,????,????????3?????,????50?????????????,??,?18??3?50???????????????????????????????,???????????????
??«??????»?????,?,?????6??????????18?5????????????????????????(?????)
???????:????