b-u bbb bbc bbf bbh bbn bbo bbu bcb bcc bcf bch bcn bco bcu bfb bfc bff bfh bfn bfo bfu bhb bhc bhf bhh bho bhu bnb bnc bnf bnn bno bnu bob boc bof boh bon boo bou bub buc buf buh bun buo buu c-- cbb cbc cbf cbh cbn cbo cbu ccb ccc ccf cch ccn cco ccu cfb cfc cff cfh cfn cfo cfu ch- chb chc chf chh chn cho chu cn- cnb cnc cnf cnh cnn cno cnu co- cob coc cof coh con coo cou cub cuc cuf cuh cun cuo cuu fbb fbc fbf fbh fbn fbo fbu fcb fcc fcf fcn fco fcu ffc fff ffh ffn ffo ffu fhb fhc fhf fhh fhn fho fnb fnc fnf fnh fnn fnu fob foc fof foh fon foo fou fub fuf fun fuo fuu hbb hbc hbf hbh hbn hbo hbu hcb hcc hcf hch hcn hco hfb hfc hff hfh hfn hfo hfu hhb hhc hhf hhh hhn hho hhu hnb hnc hnf hnh hnn hno hnu hob hoc hof hoh hon hoo hou hub huc huf huh hun huo huu nbb nbc nbf nbn nbo nbu ncb ncc ncf nch ncn nco ncu nfb nfc nff nfn nfo nfu nhb nhc nhf nhh nhn nhu nnb nnc nnf nnh nnn nno nnu no- nob noc nof noh non noo nou nub nuc nuh nun nuo nuu ob- obb obc obf obh obn obo obu oc- ocb occ ocf och ocn oco ocu of- ofb ofc off ofn ofo ofu ohc ohf ohh ohn oho ohu on- onb onc onf onh onn ono onu oo- oob ooc oof ooh oon ooo ou- ouc ouf ouh oun ouo ubb ubc ubf ubh ubn ubo ubu ucb ucc ucf uch ucn uco ucu ufc uff ufh ufn ufo ufu uhb uhc uhf uhh uho uhu un- unb unc unf unh unn uno unu uob uoc uon uoo uuc uun uuu