(B')R2 U' F
D' F2 R U2 L'
D' R2 U'(L2 B2 D' B2 D)
(U2 F2 L2 U2 R2)

TOOK ME FOREVER

(R' F L2 U' L)
(U' R2 B')    //8+6c3 4E
B2 L2 U' B2 R2 U' B2 D'
R2 U2 L2 # F2  //S 20

#=U2 F' B L2 F B'  6-3/23

sucked，wasted some time on bb no good result

(R2 B U')  //44
F' R' D2 B2 U2 D2 L //10+6c3 4e
(R2 B R2 B*' L2 B*)  //HTR  16
(D2 L2 B2 U2 L2)   //S  21-1

*=w  +0

(D)D2 B U  //78  5p
(B' L F' R2 B R L')  //78 to 88  11+4b2 4E

ext：
(B F2 R [F' L2 B] R' L')//12+4b2 6E
B' D2 B R2 L2 F B' //E  19

[]=B' U2 F' B2  +1

D2 B U B' D2 {B R2 L2 F B' R L} B2 F U2 B R' B' F2 D'

{}=F' U2 D2 F2 R L F2 B2  -2/18

//sEO M on UD
R, B2 L2 F D2 R  //DR-1s 4a3
F' U D  //DR 9+4b2 4E
(R'）L2 U2 R' D2 R' F2 R
L2 F2 B2 U2 F2  //Fin  22

(U2 D2 F D' F') //5+6c3-2s 
R' L'(R2 U R L') //11+4b2 6E
U2 R2 B R2 F  //HTR 16
D2 B2 D2 B2 R2 B2  //Fin  22

...B2 R2 B2 R' L U'...=R' L U2 R2 U  -1/21

学习一下

D2 F L U
B D2 R' F2 U2 L'  //10+2C3 4E
Bw L2 Fw R2 F
U2 B2 D2 R2 F2 R2 F2  //S+0  22


sooooo many vars，feels like that I'm missing a 20

(B' L F' D')
(L2 @ F U2 R2 B2 L) //10+4b2
(B' D2 F' D2 #)  //HTR & L8E  14

@=B2 * F2 z2  //8E→6E4X
#=R2 L2 x2  //6E4X→4E4X
*=U2 D2 y2   //sloved  +5/19 lol

edit：It can be found easily by DR if you switch after EO but it's 4c4e 0 pair

D' L' F' U
R2 F'([F2 R2 D2 L2 F'])  //11+4b2
R2 B2 L U2 R U2  //S  17


[]=B2 L2 F B' R2 D2 B'  +2

L' U' B'(F',U' L)  //rzp88 6p
U' F2 D' R' L'   //11+2c3 4E
D' L2 B2 D L2 D    //HTR  17
F2 D2 R2 B2      //Fin 21

U' R'(D' L, F) //rzp 88, 5p
B' U F' D' B   //10+2c3 4E
(R2 U')U R2 U  //HTR 15
B2 D2 B2 D2 R2 B2 R2  //Fin  22

B' D' U2 F
L2 U2 L2 U' R' U  //10+3
F2 R2 U2 Lw D2 Lw' D2 L  //HTR Ext
F2 U2 B2 U2  //M+0

R(F2 B R')
(L2 B D F') 8+4b2 4e
F2 L2 U L2 D'
B2 U2 D2 L2 B2  //random 3e and S-4x  18

noticed that F wont change anything and D' will fix 3E to S slice
so：
R F2 L2 U L2 D' B2 U2 D2 L2 B2 z2 F D'
(F2 B R' [L2 B])  //S slice
[]=F B' U2 F z2  +2/20