a-a a-b a-t aaa aab aam aan aar aas aat aau ab- aba abb abm abn abr abs abt abu ama amb amm amn amr ams amt amu an- ana anb anm ann anr ans ant anu ar- ara arb arm arn arr ars art aru as- asa asb asm asn asr ass ast asu at- ata atb atm atn atr ats att atu au- aua aub aum aun aur aus aut b-u baa bab bam ban bar bas bat bau bba bbb bbm bbn bbr bbs bbt bbu bma bmb bmm bmn bmr bms bmt bmu bna bnb bnn bnr bns bnt bnu bra brb brm brn brr brs brt bru bsa bsb bsm bsn bsr bss bst bsu bta btb btm btn btr bts btt btu bua bub bum bun bur bus but buu m-r maa mab mam man mar mas mat mau mba mbb mbm mbr mbs mbt mbu mma mmb mmm mmn mmr mms mmt mmu mna mnb mnm mnn mnr mns mnt mnu mra mrb mrm mrn mrr mrs mrt mru msa msb msm msn msr mss mst msu mta mtb mtm mtn mtr mts mtt mtu mua mub mum mun mur mus mut muu naa nab nam nan nar nas nat nau nba nbb nbm nbn nbr nbs nbt nbu nma nmb nmm nmn nmr nms nmt nmu nna nnb nnm nnn nns nnt nnu nra nrb nrm nrn nrr nrs nrt nru nsa nsb nsm nsn nsr nss nst nsu nta ntb ntm ntn ntr nts ntt ntu nua nub num nun nur nus nut nuu ra- raa rab ram ran rar ras rat rau rba rbb rbm rbn rbr rbs rbt rbu rma rmb rmm rmn rmr rms rmt rna rnb rnm rnn rnr rns rnt rnu rra rrb rrm rrn rrr rrs rrt rru rsa rsb rsm rsn rsr rss rst rsu rta rtb rtm rtn rtr rts rtt rtu rua rub rum run rur rus rut ruu saa sab sam san sar sas sat sau sba sbb sbm sbn sbr sbs sbt sbu sma smb smm smn smr sms smt smu sna snb snm snn snr sns snt snu sr- sra srb srm srn srr srs srt ss- ssa ssb ssm ssn ssr sss sst ssu sta stb stm stn str sts stt stu sua sub sum sun sur sus sut suu taa tab tam tan tar tas tat tau tba tbb tbm tbn tbr tbs tbt tbu tma tmb tmm tmn tmr tms tmt tmu tna tnb tnm tnn tnr tns tnt tra trb trm trn trr trs trt tru tsa tsb tsm tsn tsr tss tst tsu tta ttb ttm ttn ttr tts ttt ttu tua tub tum tun tur tus tut tuu ua- uaa uab uam uan uar uas uat uau uba ubb ubn ubr ubs ubt ubu um- uma umb umm umn umr ums umt umu un- una unb unm unn unr uns unt unu ur- ura urb urm urn urr urs urt uru usa usb usm usn usr uss ust usu uta utb utm utn utr uts utt utu uua uum uun uur uus uut uuu