ϺF(xin)I(y)W(xu)Ժ
II(y)W(xu)D^
ĴW(xu)D^
ЈD^
ɽ|I(y)W(xu)ԺD^
ɽ|ʡD^
ɽ|̌W(xu)ԺD^
ɽ̌W(xu)ԺD^