9t1b0m au1b bu1b0 cu1b0m du1b

yk2b zk2b0 0k2b0m 1k2b 2k2b0

nb3b0 ob3b0m pb3b qb3b0 rb3b0m

c23b0m d23b e23b0 f23b0m g23b

1s4b 2s4b0 3s4b0m 4s4b 5s4b0