a-a a-b a-i a-t aaa aab aai aam aao aap aar aas aat ab- aba abb abi abm abo abp abr abs abt ai- aia aib aii aim aio aip air ais ait ama amb ami amm amo amp amr ams amt aoa aob aoi aom aoo aop aor aos aot ap- apa apb api apm apo app apr aps apt ar- ara arb ari arm aro arp arr ars art as- asa asb asi asm aso asp asr ass ast at- ata atb ati atm ato atp atr ats att b-p baa bab bai bam bao bap bar bas bat bba bbb bbi bbm bbo bbp bbr bbs bbt bi- bia bib bii bim bio bip bir bis bit bma bmb bmi bmm bmo bmp bmr bms bmt boa bob boi bom boo bop bor bos bot bpa bpb bpi bpm bpo bpp bpr bps bpt bra brb bri brm bro brp brr brs brt bsa bsb bsi bsm bso bsp bsr bss bst bta btb bti btm bto btp btr bts btt ia- iaa iab iai iam iao iap iar ias iat iba ibb ibi ibm ibo ibp ibr ibs ibt iia iib iii iim iio iip iir iis iit im- ima imb imi imm imo imp ims imt io- ioa iob ioi iom ioo iop ior ios iot ipa ipb ipi ipm ipo ipp ipr ips ipt ir- ira irb iri irm iro irp irr irs irt is- isa isb isi ism iso isp isr iss ist ita itb iti itm ito itp its itt m-o m-r maa mab mai mam mao map mar mas mat mba mbb mbi mbm mbo mbp mbr mbs mbt mi- mia mib mii mim mio mip mir mis mit mma mmb mmi mmm mmo mmp mmr mms mmt moa mob moi mom moo mop mor mos mot mpa mpb mpi mpm mpo mpp mpr mps mpt mra mrb mri mrm mro mrp mrr mrs mrt msa msb msi msm mso msp msr mss mst mta mtb mti mtm mto mtp mtr mts mtt o-i oaa oab oai oam oao oap oar oas oat ob- oba obb obi obm obo obp obr obs obt oia oib oii oim oio oip oir ois oit om- oma omb omi omm omo omp omr oms omt oo- ooa oob ooi oom ooo oop oor oos oot op- opa opb opi opm opo opp opr ops opt or- ora orb ori orm oro orp orr ors ort os- osa osb osi osm oso osp osr oss ost ot- ota otb oti otm oto otp otr ots ott p-p paa pab pai pam pao pap par pas pat pba pbb pbi pbm pbo pbp pbr pbs pbt pia pib pii pim pio pip pir pis pit pma pmb pmi pmm pmo pmp pmr pms pmt poa pob poi pom poo pop por pos pot ppa ppb ppi ppm ppo ppp ppr pps ppt pra prb pri prm pro prp prr prs prt ps- psa psb psi psm pso psp psr pss pst pt- pta ptb pti ptm pto ptp ptr pts ptt ra- raa rab rai ram rao rap rar ras rat rba rbb rbi rbm rbo rbp rbr rbs rbt ria rib rii rim rio rip rir ris rit rma rmb rmi rmm rmo rmp rmr rms rmt roa rob roi rom roo rop ror ros rot rpa rpb rpi rpm rpo rpp rpr rps rpt rra rrb rri rrm rrp rrr rrs rrt rsa rsb rsi rsm rso rsp rsr rss rst rta rtb rti rtm rto rtp rtr rts rtt saa sab sai sam sao sap sar sas sat sba sbb sbi sbm sbo sbp sbr sbs sbt sia sib sii sim sio sip sir sis sit sma smb smi smm smo smp smr sms smt soa sob soi som soo sop sor sos sot spa spb spi spm spo spp spr sps spt sr- sra srb sri srm sro srp srr srs srt ss- ssa ssb ssi ssm sso ssp ssr sss sst sta stb sti stm sto stp str sts stt taa tab tai tam tao tap tar tas tat tba tbb tbi tbm tbo tbp tbr tbs tbt tia tib tii tim tio tip tir tis tit tma tmb tmi tmm tmo tmp tmr tms tmt to- toa tob toi tom too top tor tos tot tpa tpb tpi tpm tpo tpp tpr tps tpt tra trb tri trm tro trp trr trs trt tsa tsb tsi tsm tso tsp tsr tss tst tta ttb tti ttm tto ttp ttr tts ttt