a-a a-b a-c aaa aab aac aag aak aan aas aau ab- aba abb abc abg abk abn abs abu ac- aca acb acc acg ack acn acs acu ag- aga agb agc agg agk agn ags agu aka akb akc akg akk akn aks aku an- ana anb anc ang ank ann ans anu as- asa asb asc asg ask asn ass asu au- aua aub auc aug auk aun aus b-u baa bab bac bag bak ban bas bau bba bbb bbc bbg bbk bbn bbs bbu bca bcb bcc bcg bck bcn bcs bcu bga bgb bgc bgg bgk bgn bgs bgu bka bkb bkc bkg bkk bkn bks bna bnb bnc bng bnk bnn bns bnu bsa bsb bsc bsg bsk bsn bss bsu bua bub buc bug buk bun bus buu c-- caa cab cac cag cak can cas cau cba cbb cbc cbg cbk cbn cbs cbu cca ccb ccc ccg cck ccn ccs ccu cga cgb cgc cgg cgn cgs cgu cka ckb ckc cks cn- cna cnb cnc cng cnn cns cnu csa csb csc csg csk csn css csu cua cub cuc cug cuk cun cus cuu gaa gab gac gag gak gan gas gau gba gbc gbg gbk gbn gbs gbu gca gcb gcc gcg gck gcn gcs gcu gga ggb ggc ggg ggn ggs ggu gka gkb gkn gks gna gnb gnc gnn gns gnu gsa gsb gsc gsg gsk gsn gss gsu gu- gua gub guc gug guk gun gus guu ka- kaa kab kac kag kak kan kas kau kba kbb kbc kbk kbn kbs kbu kca kcb kcc kcg kck kcn kcs kcu kga kgb kgc kgs kgu kkb kkc kkk kkn kks kku kn- kna knc kng knk knn knu ksa ksb ksc ksg ksk ksn kss ksu kub kuc kug kuk kun kus kuu naa nab nac nag nak nan nas nau nba nbb nbc nbg nbk nbn nbs nbu nca ncb ncc ncg nck ncn ncs ncu nga ngb ngc ngg ngk ngn ngs ngu nka nkc nkk nkn nks nku nna nnb nnc nng nnk nnn nns nnu nsa nsb nsc nsg nsk nsn nss nsu nua nub nuc nug nuk nun nus nuu saa sab sac sag sak san sas sau sba sbb sbc sbg sbk sbn sbs sbu sca scb scc scg sck scn scs scu sga sgb sgc sgg sgk sgn sgs sgu sk- ska skb skc skg skk sks sku sna snb snc sng snk snn sns snu ss- ssa ssb ssc ssg ssk ssn sss ssu sua sub suc sug suk sun sus suu ua- uaa uab uac uag uak uan uas uau uba ubb ubc ubg ubk ubn ubs ubu uca ucb ucc ucg uck ucn ucs ucu uga ugb ugc ugg ugk ugn ugs ugu uka ukb ukc ukk ukn uku un- una unb unc ung unk unn uns unu usa usb usc usg usk usn uss usu uua uuc uug uun uus uuu