b-u bbb bbd bbf bbh bbn bbo bbu bdb bdd bdf bdh bdo bdu bfb bfd bff bfh bfn bfo bfu bhb bhd bhf bhh bho bhu bnb bnd bnf bnn bno bnu bob bod bof boh bon boo bou bub bud buf buh bun buo buu dbb dbd dbf dbh dbn dbo dbu ddb ddd ddf ddh ddn ddo ddu dfb dfd dff dfh dfn dfo dfu dh- dhb dhd dhf dhh dho dhu dnb dnd dnf dnh dnn dno dob dod dof doh don doo dou dub dud duf duh dun duo fbb fbd fbf fbh fbn fbo fbu fdb fdd fdf fdh fdn fdo fdu ffd fff ffh ffn ffo ffu fhb fhf fhh fhn fho fnb fnd fnf fnh fnn fnu fob fof foh fon foo fou fub fud fuf fun fuo fuu hbb hbd hbf hbh hbn hbo hbu hdb hdd hdf hdh hdn hdo hdu hfb hfd hff hfh hfn hfo hfu hhb hhd hhf hhh hhn hho hhu hnb hnd hnf hnh hnn hno hnu hob hod hof hoh hon hoo hou hub hud huf huh hun huo huu nbb nbd nbf nbn nbo nbu ndb ndd ndf ndh ndn ndo ndu nfb nfd nff nfn nfo nfu nhb nhd nhf nhh nhn nhu nnb nnf nnh nnn nno nnu no- nob nod nof noh non noo nou nub nud nuh nun nuo nuu ob- obb obd obf obh obn obo obu odb odd odf odh odn odo odu of- ofb ofd off ofn ofo ofu ohd ohf ohh ohn oho ohu on- onb ond onf onh onn ono onu oo- oob ood oof ooh oon ooo ou- oud ouf ouh oun ouo ubb ubf ubh ubn ubo ubu udb udd udf udn udo udu ufd uff ufh ufn ufo ufu uhb uhd uhf uhh uho uhu un- unb und unf unh unn uno unu uob uod uon uoo uun uuu