-er a-a a-b a-i a-t aaa aab aae aai aam aap aar aat ab- aba abb abe abi abm abp abr abt aea aeb aee aei aem aep aer aet ai- aia aib aie aii aim aip air ait ama amb ame ami amm amp amr amt ap- apa apb ape api apm app apr apt ar- ara arb are ari arm arp arr art at- ata atb ate ati atm atp atr att b-p baa bab bae bai bam bap bar bat bba bbb bbe bbi bbm bbp bbr bbt be- bea beb bee bei bem bep ber bet bi- bia bib bie bii bim bip bir bit bma bmb bme bmi bmm bmp bmr bmt bpa bpb bpe bpi bpm bpp bpr bpt bra brb bre bri brm brp brr brt bta btb bte bti btm btp btr btt eaa eab eae eai eam eap ear eat eba ebb ebe ebi ebm ebp ebr ebt eea eeb eee eem eep eer eet eia eib eie eii eim eip eir eit em- ema emb eme emi emm emp emr emt ep- epa epb epe epi epm epp epr ept era erb ere eri erm erp err ert eta etb ete eti etm etp etr ett ia- iaa iab iae iai iam iap iar iat iba ibb ibe ibi ibm ibp ibr ibt ie- iea iee iei iem iep ier iet iia iib iie iii iim iip iir iit im- ima imb ime imi imm imp imt ipa ipb ipe ipi ipm ipp ipr ipt ir- ira irb ire iri irm irp irr irt ita itb ite iti itm itp itt m-r maa mab mae mai mam map mar mat mba mbb mbe mbi mbm mbp mbr mbt mea meb mee mei mem mep mer met mi- mia mib mie mii mim mip mir mit mma mmb mme mmi mmm mmp mmr mmt mpa mpb mpe mpi mpm mpp mpr mpt mra mrb mre mri mrm mrp mrr mrt mta mtb mte mti mtm mtp mtr mtt p-p paa pab pae pai pam pap par pat pba pbb pbe pbi pbm pbp pbr pbt pea peb pee pei pem pep per pet pia pib pie pii pim pip pir pit pma pmb pme pmi pmm pmp pmr pmt ppa ppb ppe ppi ppm ppp ppr ppt pra prb pre pri prm prp prr prt pt- pta ptb pte pti ptm ptp ptr ptt ra- raa rab rae rai ram rap rar rat rba rbb rbe rbi rbm rbp rbr rbt re- rea reb ree rei rem rep rer ret ria rib rie rii rim rip rir rit rma rmb rme rmi rmm rmp rmr rmt rpa rpb rpe rpi rpm rpp rpr rpt rra rrb rri rrm rrp rrr rrt rta rtb rte rti rtm rtp rtr rtt taa tab tae tai tam tap tar tat tba tbb tbe tbi tbm tbp tbr tbt te- tea teb tee tei tem tep ter tet tia tib tie tii tim tip tir tit tma tmb tme tmi tmm tmp tmr tmt tpa tpb tpe tpi tpm tpp tpr tpt tra trb tre tri trm trp trr trt tta ttb tte tti ttm ttp ttr ttt