obc4sv pbc4 qbc4s rbc4sv sbc4

d2c4 e2c4s f2c4sv g2c4 h2c4s

2sd4s 3sd4sv 4sd4 5sd4s 6sd4sv

rje4sv sje4 tje4s uje4sv vje4

gaf4 haf4s iaf4sv jaf4 kaf4s