a-a a-b a-c aaa aab aac aag aam aan aar aau ab- aba abb abc abg abm abn abr abu ac- aca acb acc acg acm acn acr acu ag- aga agb agc agg agm agn agr agu ama amb amc amg amm amn amr amu an- ana anb anc ang anm ann anr anu ar- ara arb arc arg arm arn arr aru au- aua aub auc aug aum aun aur b-u baa bab bac bag bam ban bar bau bba bbb bbc bbg bbm bbn bbr bbu bca bcb bcc bcg bcm bcn bcr bcu bga bgb bgc bgg bgm bgn bgr bgu bma bmb bmc bmg bmm bmn bmr bmu bna bnb bnc bng bnn bnr bnu bra brb brg brm brn brr bru bua bub buc bug bum bun bur buu c-- caa cab cac cag cam can car cau cba cbb cbc cbg cbm cbn cbr cbu cca ccb ccc ccg ccm ccn ccr ccu cga cgb cgc cgg cgm cgn cgr cgu cma cmb cmc cmg cmm cmn cmr cmu cn- cna cnb cnc cng cnm cnn cnr cnu cra crb crc crg crm crn crr cru cua cub cuc cug cum cun cur cuu gaa gab gac gag gam gan gar gau gba gbc gbg gbm gbn gbr gbu gca gcb gcc gcg gcm gcn gcr gcu gga ggb ggc ggg ggm ggn ggr ggu gma gmb gmc gmg gmm gmn gmr gna gnb gnc gnm gnn gnr gnu gra grb grc grg grm grn grr gru gu- gua gub guc gug gum gun gur guu m-r maa mab mac mag mam man mar mau mba mbb mbc mbg mbm mbr mbu mc- mca mcb mcc mcg mcm mcn mcr mcu mga mgb mgc mgm mgn mgr mgu mma mmb mmc mmg mmm mmn mmr mmu mna mnb mnc mng mnm mnn mnr mnu mra mrb mrc mrg mrm mrn mrr mru mua mub muc mug mum mun mur muu naa nab nac nag nam nan nar nau nba nbb nbc nbg nbm nbn nbr nbu nca ncb ncc ncg ncm ncn ncr ncu nga ngb ngc ngg ngm ngn ngu nma nmb nmc nmg nmm nmn nmr nmu nna nnb nnc nng nnm nnn nnu nra nrb nrc nrg nrm nrn nrr nru nua nub nuc nug num nun nur nuu ra- raa rab rac rag ram ran rar rau rba rbb rbc rbg rbm rbn rbr rbu rca rcb rcc rcg rcm rcn rcr rcu rga rgb rgc rgg rgn rgr rma rmb rmc rmg rmm rmn rmr rna rnb rnc rng rnm rnn rnr rnu rra rrb rrc rrg rrm rrn rrr rru rua rub ruc rug rum run rur ruu ua- uaa uab uac uag uam uan uar uau uba ubb ubc ubg ubn ubr ubu uca ucb ucc ucg ucm ucn ucr ucu uga ugb ugc ugg ugm ugn ugr ugu um- uma umb umc umg umm umn umr umu un- una unb unc ung unm unn unr unu ur- ura urb urc urg urm urn urr uru uua uuc uug uum uun uur uuu