a-a a-b a-t aaa aab aam aan aao aap aar aat ab- aba abb abm abn abo abp abr abt ama amb amm amn amo amp amr amt an- ana anb anm ann ano anp anr ant aoa aob aom aon aoo aop aor aot ap- apa apb apm apn apo app apr apt ar- ara arb arm arn aro arp arr art at- ata atb atm atn ato atp atr att b-p baa bab bam ban bao bap bar bat bba bbb bbm bbn bbo bbp bbr bbt bma bmb bmm bmn bmo bmp bmr bmt bna bnb bnn bno bnp bnr bnt boa bob bom bon boo bop bor bot bpa bpb bpm bpn bpo bpp bpr bpt bra brb brm brn bro brp brr brt bta btb btm btn bto btp btr btt m-o m-r maa mab mam man mao map mar mat mba mbb mbm mbo mbp mbr mbt mma mmb mmm mmn mmo mmp mmr mmt mna mnb mnm mnn mno mnp mnr mnt moa mob mom mon moo mop mor mot mpa mpb mpm mpn mpo mpp mpr mpt mra mrb mrm mrn mro mrp mrr mrt mta mtb mtm mtn mto mtp mtr mtt naa nab nam nan nao nap nar nat nba nbb nbm nbn nbo nbp nbr nbt nma nmb nmm nmn nmo nmp nmr nmt nna nnb nnm nnn nno nnp nnt no- noa nob nom non noo nop nor not npa npb npm npn npo npp npr npt nra nrb nrm nrn nro nrp nrr nrt nta ntb ntm ntn nto ntp ntr ntt oaa oab oam oan oao oap oar oat ob- oba obb obm obn obo obp obr obt om- oma omb omm omn omo omp omr omt on- ona onb onn ono onp onr ont oo- ooa oob oom oon ooo oop oor oot op- opa opb opm opn opo opp opr opt or- ora orb orm orn oro orp orr ort ot- ota otb otm otn oto otp otr ott p-p paa pab pam pan pao pap par pat pba pbb pbm pbn pbo pbp pbr pbt pma pmb pmm pmn pmo pmp pmr pmt pn- pna pnb pnm pnn pno pnp pnr pnt poa pob pom pon poo pop por pot ppa ppb ppm ppn ppo ppp ppr ppt pra prb prm prn pro prp prr prt pt- pta ptb ptm ptn pto ptp ptr ptt ra- raa rab ram ran rao rap rar rat rba rbb rbm rbn rbo rbp rbr rbt rma rmb rmm rmn rmo rmp rmr rmt rna rnb rnm rnn rno rnp rnr rnt roa rob rom ron roo rop ror rot rpa rpb rpm rpn rpo rpp rpr rpt rra rrb rrm rrn rrp rrr rrt rta rtb rtm rtn rto rtp rtr rtt taa tab tam tan tao tap tar tat tba tbb tbm tbn tbo tbp tbr tbt tma tmb tmm tmn tmo tmp tmr tmt tna tnb tnm tnn tno tnp tnr tnt to- toa tob tom ton too top tor tot tpa tpb tpm tpn tpo tpp tpr tpt tra trb trm trn tro trp trr trt tta ttb ttm ttn tto ttp ttr ttt