b-u bbb bbg bbh bbm bbn bbr bbu bgb bgg bgh bgm bgn bgr bgu bhb bhg bhh bhm bhr bhu bmb bmg bmh bmm bmn bmr bmu bnb bng bnn bnr bnu brb brg brh brm brn brr bru bub bug buh bum bun bur buu gbg gbh gbm gbn gbr gbu ggb ggg ggh ggm ggn ggr ggu ghb ghg ghh ghn ghr gmb gmg gmh gmm gmn gmr gnb gnm gnn gnr gnu grb grg grh grm grn grr gru gu- gub gug gum gun gur guu hbb hbg hbh hbm hbn hbr hbu hgb hgg hgh hgm hgn hgr hgu hhb hhg hhh hhm hhn hhr hhu hmb hmg hmh hmm hmr hmu hnb hng hnh hnn hnu hr- hrb hrg hrh hrm hrn hrr hru hub hug huh hum hun hur huu m-r mbb mbg mbh mbm mbr mbu mgb mgh mgm mgn mgr mgu mhg mhh mhm mhn mhr mhu mmb mmg mmh mmm mmn mmr mmu mnb mng mnm mnn mnr mnu mrb mrg mrh mrm mrn mrr mru mub mug muh mum mun mur muu nbb nbg nbm nbn nbr nbu ngb ngg ngh ngm ngn ngu nhb nhg nhh nhm nhn nhr nhu nmb nmg nmh nmm nmn nmr nmu nnb nng nnh nnm nnn nnu nrb nrg nrm nrn nrr nru nub nug nuh num nun nur nuu rbb rbg rbh rbm rbn rbr rbu rgb rgg rgh rgn rgr rh- rhb rhg rhh rhm rhn rhr rhu rmb rmg rmh rmm rmn rmr rnb rng rnh rnm rnn rnr rnu rrb rrg rrh rrm rrn rrr rru rub rug ruh rum run rur ruu ubb ubg ubh ubn ubr ubu ugb ugg ugh ugm ugn ugr ugu uhb uhh uhm uhr uhu um- umb umg umh umm umn umr umu un- unb ung unh unm unn unr unu ur- urb urg urm urn urr uru uug uum uun uur uuu