1sr2 0sr2pm zsr2p ysr2 xsr2pm

c2q2pm b2q2p a2q2 91q2pm 81q2p

nbq2p mbq2 lbq2pm kbq2p jbq2

ykp2 xkp2pm wkp2p vkp2 ukp2pm

9to2pm 8to2p 7to2 6to2pm 5to2p