$ a b S E F B A s1 . s6 . s2 s3 . s4 s5 s2 ac r6'0 . . s7 r6'1 . . s3 . s11 . s8 s3 . s9 s10 s4 . s13 . . s12 . . r6'0 s5 . . s14 . . . . . s6 . . r8'0 . . . . . s7 . r6'1 . . s15 . . . s8 . r6'0 . . s7 s16 . . s9 . s18 . . s17 . . r6'0 s10 . . s19 . . . . . s11 . . r8'0 . . . . . s12 . s13 . . . . . s20 s13 r8'0 r6'0 . . s7 r8'0 . . s14 . s24 . . s22 s21 r6'0 s23 s15 . r5'0 . . . . . . s16 . s25 . . . . . . s17 . s18 . . . . . s26 s18 . r6'0 . . s7 r8'0 . . s19 . s30 . . s28 s27 r6'0 s29 s20 r3'0 r6'0 . . s7 r3'0 . . s21 . s33 . . . . s31 s32 s22 . s24 . . s34 . r6'1 s35 s23 r6'1 r6'0 s36 . s7 r6'1 . . s24 r8'0 r6'0 r8'0 . s7 r8'0 . . s25 r2'0 r6'0 . . s7 r2'0 . . s26 . r6'0 . . s7 r3'0 . . s27 . s39 . . . . s37 s38 s28 . s30 . . s40 . r6'1 s41 s29 . r6'0 s42 . s7 r6'1 . . s30 . r6'0 r8'0 . s7 r8'0 . . s31 r4'0 r6'0 . . s7 r4'0 . . s32 . . s36 . . . . . s33 . . r8'0 . . . . . s34 . s33 . . . . r5'0 s32 s35 r7'2 r6'0 s36 . s7 r7'2 . . s36 r7'0 r6'0 . . s7 r7'0 . . s37 . r6'0 . . s7 r4'0 . . s38 . . s42 . . . . . s39 . . r8'0 . . . . . s40 . s39 . . . . r5'0 s38 s41 . r6'0 s42 . s7 r7'2 . . s42 . r6'0 . . s7 r7'0 . .