a-a a-b a-c a-t aaa aab aac aam aan aar aat aau ab- aba abb abc abm abn abr abt abu ac- aca acb acc acm acn acr act acu ama amb amc amm amn amr amt amu an- ana anb anc anm ann anr ant anu ar- ara arb arc arm arn arr art aru at- ata atb atc atm atn atr att atu au- aua aub auc aum aun aur aut b-u baa bab bac bam ban bar bat bau bba bbb bbc bbm bbn bbr bbt bbu bca bcb bcc bcm bcn bcr bct bcu bma bmb bmc bmm bmn bmr bmt bmu bna bnb bnc bnn bnr bnt bnu bra brb brm brn brr brt bru bta btb btc btm btn btr btt btu bua bub buc bum bun bur but buu c-- caa cab cac cam can car cat cau cba cbb cbc cbm cbn cbr cbt cbu cca ccb ccc ccm ccn ccr cct ccu cma cmb cmc cmm cmn cmr cmt cmu cn- cna cnb cnc cnm cnn cnr cnt cnu cra crb crc crm crn crr crt cru cta ctb ctc ctm ctn ctr ctt ctu cua cub cuc cum cun cur cut cuu m-r maa mab mac mam man mar mat mau mba mbb mbc mbm mbr mbt mbu mc- mca mcb mcc mcm mcn mcr mct mcu mma mmb mmc mmm mmn mmr mmt mmu mna mnb mnc mnm mnn mnr mnt mnu mra mrb mrc mrm mrn mrr mrt mru mta mtb mtc mtm mtn mtr mtt mtu mua mub muc mum mun mur mut muu naa nab nac nam nan nar nat nau nba nbb nbc nbm nbn nbr nbt nbu nca ncb ncc ncm ncn ncr nct ncu nma nmb nmc nmm nmn nmr nmt nmu nna nnb nnc nnm nnn nnt nnu nra nrb nrc nrm nrn nrr nrt nru nta ntb ntc ntm ntn ntr ntt ntu nua nub nuc num nun nur nut nuu ra- raa rab rac ram ran rar rat rau rba rbb rbc rbm rbn rbr rbt rbu rca rcb rcc rcm rcn rcr rct rcu rma rmb rmc rmm rmn rmr rmt rna rnb rnc rnm rnn rnr rnt rnu rra rrb rrc rrm rrn rrr rrt rru rta rtb rtc rtm rtn rtr rtt rtu rua rub ruc rum run rur rut ruu taa tab tac tam tan tar tat tau tba tbb tbc tbm tbn tbr tbt tbu tca tcb tcc tcm tcn tcr tct tcu tma tmb tmc tmm tmn tmr tmt tmu tna tnb tnc tnm tnn tnr tnt tra trb trc trm trn trr trt tru tta ttb ttc ttm ttn ttr ttt ttu tua tub tuc tum tun tur tut tuu ua- uaa uab uac uam uan uar uat uau uba ubb ubc ubn ubr ubt ubu uca ucb ucc ucm ucn ucr uct ucu um- uma umb umc umm umn umr umt umu un- una unb unc unm unn unr unt unu ur- ura urb urc urm urn urr urt uru uta utb utc utm utn utr utt utu uua uuc uum uun uur uut uuu