a-a a-b a-t aaa aab aam aan aao aar aas aat aau ab- aba abb abm abn abo abr abs abt abu ama amb amm amn amo amr ams amt amu an- ana anb anm ann ano anr ans ant anu aoa aob aom aon aoo aor aos aot aou ar- ara arb arm arn aro arr ars art aru as- asa asb asm asn aso asr ass ast asu at- ata atb atm atn ato atr ats att atu au- aua aub aum aun auo aur aus aut b-u baa bab bam ban bao bar bas bat bau bba bbb bbm bbn bbo bbr bbs bbt bbu bma bmb bmm bmn bmo bmr bms bmt bmu bna bnb bnn bno bnr bns bnt bnu boa bob bom bon boo bor bos bot bou bra brb brm brn bro brr brs brt bru bsa bsb bsm bsn bso bsr bss bst bsu bta btb btm btn bto btr bts btt btu bua bub bum bun buo bur bus but buu m-o m-r maa mab mam man mao mar mas mat mau mba mbb mbm mbo mbr mbs mbt mbu mma mmb mmm mmn mmo mmr mms mmt mmu mna mnb mnm mnn mno mnr mns mnt mnu moa mob mom mon moo mor mos mot mou mra mrb mrm mrn mro mrr mrs mrt mru msa msb msm msn mso msr mss mst msu mta mtb mtm mtn mto mtr mts mtt mtu mua mub mum mun mur mus mut muu naa nab nam nan nao nar nas nat nau nba nbb nbm nbn nbo nbr nbs nbt nbu nma nmb nmm nmn nmo nmr nms nmt nmu nna nnb nnm nnn nno nns nnt nnu no- noa nob nom non noo nor nos not nou nra nrb nrm nrn nro nrr nrs nrt nru nsa nsb nsm nsn nso nsr nss nst nsu nta ntb ntm ntn nto ntr nts ntt ntu nua nub num nun nuo nur nus nut nuu oaa oab oam oan oao oar oas oat oau ob- oba obb obm obn obo obr obs obt obu om- oma omb omm omn omo omr oms omt omu on- ona onb onn ono onr ons ont onu oo- ooa oob oom oon ooo oor oos oot or- ora orb orm orn oro orr ors ort oru os- osa osb osm osn oso osr oss ost osu ot- ota otb otm otn oto otr ots ott otu ou- oua oum oun ouo our ous out ra- raa rab ram ran rao rar ras rat rau rba rbb rbm rbn rbo rbr rbs rbt rbu rma rmb rmm rmn rmo rmr rms rmt rna rnb rnm rnn rno rnr rns rnt rnu roa rob rom ron roo ror ros rot rou rra rrb rrm rrn rrr rrs rrt rru rsa rsb rsm rsn rso rsr rss rst rsu rta rtb rtm rtn rto rtr rts rtt rtu rua rub rum run ruo rur rus rut ruu saa sab sam san sao sar sas sat sau sba sbb sbm sbn sbo sbr sbs sbt sbu sma smb smm smn smo smr sms smt smu sna snb snm snn sno snr sns snt snu soa sob som son soo sor sos sot sou sr- sra srb srm srn sro srr srs srt ss- ssa ssb ssm ssn sso ssr sss sst ssu sta stb stm stn sto str sts stt stu sua sub sum sun suo sur sus sut suu taa tab tam tan tao tar tas tat tau tba tbb tbm tbn tbo tbr tbs tbt tbu tma tmb tmm tmn tmo tmr tms tmt tmu tna tnb tnm tnn tno tnr tns tnt to- toa tob tom ton too tor tos tot tou tra trb trm trn tro trr trs trt tru tsa tsb tsm tsn tso tsr tss tst tsu tta ttb ttm ttn tto ttr tts ttt ttu tua tub tum tun tuo tur tus tut tuu ua- uaa uab uam uan uao uar uas uat uau uba ubb ubn ubo ubr ubs ubt ubu um- uma umb umm umn umo umr ums umt umu un- una unb unm unn uno unr uns unt unu uoa uob uom uon uoo uor uos uot ur- ura urb urm urn uro urr urs urt uru usa usb usm usn uso usr uss ust usu uta utb utm utn uto utr uts utt utu uua uum uun uur uus uut uuu