xk[C̗LƖîQj

r0P

r1i{Pj^Q

r2^2i{PjiQ{Pj^U

r3^3^2i{Pj^2^SEEEƂD

@r0

@^2Qr1|r0

@^3Rr2|Rr1{r0

@^4Sr3|Ur2{Sr1|r0

@r0r0

@Qr1^2Qr3

@Sr1^3Rr5{r3

@Wr1^4Sr7{Sr5