a-a a-b a-t aaa aab aam aan aao aar aas aat ab- aba abb abm abn abo abr abs abt ama amb amm amn amo amr ams amt an- ana anb anm ann ano anr ans ant aoa aob aom aon aoo aor aos aot ar- ara arb arm arn aro arr ars art as- asa asb asm asn aso asr ass ast at- ata atb atm atn ato atr ats att baa bab bam ban bao bar bas bat bba bbb bbm bbn bbo bbr bbs bbt bma bmb bmm bmn bmo bmr bms bmt bna bnb bnn bno bnr bns bnt boa bob bom bon boo bor bos bot bra brb brm brn bro brr brs brt bsa bsb bsm bsn bso bsr bss bst bta btb btm btn bto btr bts btt m-o m-r maa mab mam man mao mar mas mat mba mbb mbm mbo mbr mbs mbt mma mmb mmm mmn mmo mmr mms mmt mna mnb mnm mnn mno mnr mns mnt moa mob mom mon moo mor mos mot mra mrb mrm mrn mro mrr mrs mrt msa msb msm msn mso msr mss mst mta mtb mtm mtn mto mtr mts mtt naa nab nam nan nao nar nas nat nba nbb nbm nbn nbo nbr nbs nbt nma nmb nmm nmn nmo nmr nms nmt nna nnb nnm nnn nno nns nnt no- noa nob nom non noo nor nos not nra nrb nrm nrn nro nrr nrs nrt nsa nsb nsm nsn nso nsr nss nst nta ntb ntm ntn nto ntr nts ntt oaa oab oam oan oao oar oas oat ob- oba obb obm obn obo obr obs obt om- oma omb omm omn omo omr oms omt on- ona onb onn ono onr ons ont oo- ooa oob oom oon ooo oor oos oot or- ora orb orm orn oro orr ors ort os- osa osb osm osn oso osr oss ost ot- ota otb otm otn oto otr ots ott ra- raa rab ram ran rao rar ras rat rba rbb rbm rbn rbo rbr rbs rbt rma rmb rmm rmn rmo rmr rms rmt rna rnb rnm rnn rno rnr rns rnt roa rob rom ron roo ror ros rot rra rrb rrm rrn rrr rrs rrt rsa rsb rsm rsn rso rsr rss rst rta rtb rtm rtn rto rtr rts rtt saa sab sam san sao sar sas sat sba sbb sbm sbn sbo sbr sbs sbt sma smb smm smn smo smr sms smt sna snb snm snn sno snr sns snt soa sob som son soo sor sos sot sr- sra srb srm srn sro srr srs srt ss- ssa ssb ssm ssn sso ssr sss sst sta stb stm stn sto str sts stt taa tab tam tan tao tar tas tat tba tbb tbm tbn tbo tbr tbs tbt tma tmb tmm tmn tmo tmr tms tmt tna tnb tnm tnn tno tnr tns tnt to- toa tob tom ton too tor tos tot tra trb trm trn tro trr trs trt tsa tsb tsm tsn tso tsr tss tst tta ttb ttm ttn tto ttr tts ttt