s7 s13 s35 s2
s11 s31 s12 s26
s6 s38 s37 s24
s18 s14 s5 s36
s25 s9 s3 s17
s1 s21 s8 s19
s39 s28 s4 s20
s10 s27 s33 s34
s16 s22 s29 s23
s32 s15