af1b bf1b2 cf1b2s df1b ef1b2

z51b2 051b2s 151b 251b2 351b2s

ow2b2s pw2b qw2b2 rw2b2s sw2b

dn3b en3b2 fn3b2s gn3b hn3b2

2d4b2 3d4b2s 4d4b 5d4b2 6d4b2s