看看食物

D'(L2 D' B U')
(R B L2 D2 F)  //10+4b2 6E ext from 9+2
F2 R D2 L  //HTR 14
F2 U D R2 U D' L2  // 18 E +3

other：
D(D' B U')
(R F D2 R2 F)   //9+4b2 4E 
only got 22 with 4qs

B' L D2 R  //4c6e 3pairs
(F D' B U2 F R2 F2 D)  //some long shit

but if you take a look at UD axis after B' L D2 R (F D' B)，some magic happens (which of course I didn't notice during my attempt):

B' L D2 R 
(F D' B') U F'  //9+2c3 also findable with rzp2 to 7c8e
(D B2 L2 U' L2 F2 U' R2 B2 R2 D2 L2)   //Fin 19

17 with extension：
B' R' L2 B2 L
(F D' B') D B   //10+2c3
R2 F2 U B2 U B2 U   //Fin 17

(R U D')
B2 R F B2 R B' R'  //10+4b2 4E
F U2* L2 B'   //pHTR  14
*=U2 F2 U2 F2 U2 F2  6-3 HTR 17
L2 U2 L2 U' D' L2 U D'  //Fin 8-4/21