a-a a-b a-i a-t aaa aab aai aam aao aap aar aat ab- aba abb abi abm abo abp abr abt ai- aia aib aii aim aio aip air ait ama amb ami amm amo amp amr amt aoa aob aoi aom aoo aop aor aot ap- apa apb api apm apo app apr apt ar- ara arb ari arm aro arp arr art at- ata atb ati atm ato atp atr att b-p baa bab bai bam bao bap bar bat bba bbb bbi bbm bbo bbp bbr bbt bi- bia bib bii bim bio bip bir bit bma bmb bmi bmm bmo bmp bmr bmt boa bob boi bom boo bop bor bot bpa bpb bpi bpm bpo bpp bpr bpt bra brb bri brm bro brp brr brt bta btb bti btm bto btp btr btt ia- iaa iab iai iam iao iap iar iat iba ibb ibi ibm ibo ibp ibr ibt iia iib iii iim iio iip iir iit im- ima imb imi imm imo imp imt io- ioa iob ioi iom ioo iop ior iot ipa ipb ipi ipm ipo ipp ipr ipt ir- ira irb iri irm iro irp irr irt ita itb iti itm ito itp itt m-o m-r maa mab mai mam mao map mar mat mba mbb mbi mbm mbo mbp mbr mbt mi- mia mib mii mim mio mip mir mit mma mmb mmi mmm mmo mmp mmr mmt moa mob moi mom moo mop mor mot mpa mpb mpi mpm mpo mpp mpr mpt mra mrb mri mrm mro mrp mrr mrt mta mtb mti mtm mto mtp mtr mtt o-i oaa oab oai oam oao oap oar oat ob- oba obb obi obm obo obp obr obt oia oib oii oim oio oip oir oit om- oma omb omi omm omo omp omr omt oo- ooa oob ooi oom ooo oop oor oot op- opa opb opi opm opo opp opr opt or- ora orb ori orm oro orp orr ort ot- ota otb oti otm oto otp otr ott p-p paa pab pai pam pao pap par pat pba pbb pbi pbm pbo pbp pbr pbt pia pib pii pim pio pip pir pit pma pmb pmi pmm pmo pmp pmr pmt poa pob poi pom poo pop por pot ppa ppb ppi ppm ppo ppp ppr ppt pra prb pri prm pro prp prr prt pt- pta ptb pti ptm pto ptp ptr ptt ra- raa rab rai ram rao rap rar rat rba rbb rbi rbm rbo rbp rbr rbt ria rib rii rim rio rip rir rit rma rmb rmi rmm rmo rmp rmr rmt roa rob roi rom roo rop ror rot rpa rpb rpi rpm rpo rpp rpr rpt rra rrb rri rrm rrp rrr rrt rta rtb rti rtm rto rtp rtr rtt taa tab tai tam tao tap tar tat tba tbb tbi tbm tbo tbp tbr tbt tia tib tii tim tio tip tir tit tma tmb tmi tmm tmo tmp tmr tmt to- toa tob toi tom too top tor tot tpa tpb tpi tpm tpo tpp tpr tpt tra trb tri trm tro trp trr trt tta ttb tti ttm tto ttp ttr ttt