s20  s  s  s  s  s  s  s  s  s  s
s19  s  s  s  s  s  s  s  s  s  s
s18  s  s  s  s  s  s  s  s  s  s
s17  s  s  s  s  s  s  s  s  s  s
s16  s  s  s  s  s  s  s  s  s  s
s15  s  s  s  s  s  s  s  s  s  s
s14  s  s  s  s  s  s  s  s  s  s
s13  s  s  s  s  s  s  s  s  s  s
s12  s  s  s  s  s  s  s  s  s  s