ri1p12 si1p ti1p1 ui1p12 vi1p

g91p h91p1 i91p12 j91p k91p1

5z2p1 6z2p12 7z2p 8z2p1 9z2p12

uq3p12 vq3p wq3p1 xq3p12 yq3p

jh4p kh4p1 lh4p12 mh4p nh4p1