a-a a-b a-t aaa aab aak aam aan aao aar aat ab- aba abb abk abm abn abo abr abt aka akb akk akm akn ako akr ama amb amk amm amn amo amr amt an- ana anb ank anm ann ano anr ant aoa aob aok aom aon aoo aor aot ar- ara arb ark arm arn aro arr art at- ata atb atm atn ato atr att baa bab bak bam ban bao bar bat bba bbb bbk bbm bbn bbo bbr bbt bka bkb bkk bkm bkn bko bkr bkt bma bmb bmk bmm bmn bmo bmr bmt bna bnb bnk bnn bno bnr bnt boa bob bok bom bon boo bor bot bra brb brk brm brn bro brr brt bta btb btk btm btn bto btr btt k-t ka- kaa kab kak kam kan kao kar kat kba kbb kbk kbm kbn kbo kbr kkb kkk kkm kkn kkr kkt kma kmb kmk kmm kmo kmt kn- kna knk knm knn kno knr knt koa kob kok kom kon koo kor kot kra krk krn kro krr krt kta ktb ktk ktm ktn kto ktr ktt m-o m-r maa mab mak mam man mao mar mat mba mbb mbk mbm mbo mbr mbt mka mkb mkk mkm mkn mko mkr mkt mma mmb mmk mmm mmn mmo mmr mmt mna mnb mnk mnm mnn mno mnr mnt moa mob mok mom mon moo mor mot mra mrb mrk mrm mrn mro mrr mrt mta mtb mtk mtm mtn mto mtr mtt naa nab nak nam nan nao nar nat nba nbb nbk nbm nbn nbo nbr nbt nka nkk nkm nkn nko nkr nkt nma nmb nmk nmm nmn nmo nmr nmt nna nnb nnk nnm nnn nno nnt no- noa nob nok nom non noo nor not nra nrb nrk nrm nrn nro nrr nrt nta ntb ntk ntm ntn nto ntr ntt oaa oab oak oam oan oao oar oat ob- oba obb obk obm obn obo obr obt oka okb okk oko okr om- oma omb omm omn omo omr omt on- ona onb onk onn ono onr ont oo- ooa oob ook oom oon ooo oor oot or- ora orb ork orm orn oro orr ort ot- ota otb otk otm otn oto otr ott ra- raa rab rak ram ran rao rar rat rba rbb rbk rbm rbn rbo rbr rbt rkb rkk rkm rko rkt rma rmb rmm rmn rmo rmr rmt rna rnb rnm rnn rno rnr rnt roa rob rok rom ron roo ror rot rra rrb rrk rrm rrn rrr rrt rta rtb rtk rtm rtn rto rtr rtt taa tab tak tam tan tao tar tat tba tbb tbk tbm tbn tbo tbr tbt tka tkb tkk tkm tko tkr tkt tma tmb tmk tmm tmn tmo tmr tmt tna tnb tnk tnm tnn tno tnr tnt to- toa tob tok tom ton too tor tot tra trb trk trm trn tro trr trt tta ttb ttk ttm ttn tto ttr ttt