apa2 bpa21 cpa21o dpa2 epa21
zfb21 0fb21o 1fb2 2fb21 3fb21o
o6b21o p6b2 q6b21 r6b21o s6b2
dxc2 exc21 fxc21o gxc2 hxc21
2nd21 3nd21o 4nd2 5nd21 6nd21o