-er a-a a-b a-t aaa aab aad aae aam aap aar aat ab- aba abb abd abe abm abp abr abt ad- ada adb add ade adm adp adr adt aea aeb aed aee aem aep aer aet ama amb amd ame amm amp amr amt ap- apa apb apd ape apm app apr apt ar- ara arb ard are arm arp arr art at- ata atb atd ate atm atp atr att b-p baa bab bad bae bam bap bar bat bba bbb bbd bbe bbm bbp bbr bbt bda bdb bdd bde bdm bdp bdr bdt be- bea beb bed bee bem bep ber bet bma bmb bmd bme bmm bmp bmr bmt bpa bpb bpd bpe bpm bpp bpr bpt bra brb brd bre brm brp brr brt bta btb btd bte btm btp btr btt daa dab dad dae dam dap dar dat dba dbb dbd dbe dbm dbp dbr dbt dda ddb ddd dde ddm ddp ddr ddt de- dea deb ded dee dem dep der det dma dmb dmd dme dmm dmp dmr dmt dpa dpb dpd dpe dpm dpp dpr dpt dra drb drd dre drm drp drr drt dta dtb dtd dte dtm dtp dtr dtt eaa eab ead eae eam eap ear eat eba ebb ebd ebe ebm ebp ebr ebt ed- eda edb edd ede edm edp edr edt eea eeb eed eee eem eep eer eet em- ema emb emd eme emm emp emr emt ep- epa epb epd epe epm epp epr ept era erb erd ere erm erp err ert eta etb etd ete etm etp etr ett m-r maa mab mad mae mam map mar mat mba mbb mbd mbe mbm mbp mbr mbt mda mdb mdd mde mdm mdp mdr mdt mea meb med mee mem mep mer met mma mmb mmd mme mmm mmp mmr mmt mpa mpb mpd mpe mpm mpp mpr mpt mra mrb mrd mre mrm mrp mrr mrt mta mtb mtd mte mtm mtp mtr mtt p-p paa pab pad pae pam pap par pat pba pbb pbd pbe pbm pbp pbr pbt pda pdb pdd pde pdm pdp pdr pdt pea peb ped pee pem pep per pet pma pmb pmd pme pmm pmp pmr pmt ppa ppb ppd ppe ppm ppp ppr ppt pra prb prd pre prm prp prr prt pt- pta ptb ptd pte ptm ptp ptr ptt ra- raa rab rad rae ram rap rar rat rba rbb rbd rbe rbm rbp rbr rbt rda rdb rdd rde rdm rdp rdr rdt re- rea reb red ree rem rep rer ret rma rmb rmd rme rmm rmp rmr rmt rpa rpb rpd rpe rpm rpp rpr rpt rra rrb rrd rrm rrp rrr rrt rta rtb rtd rte rtm rtp rtr rtt taa tab tad tae tam tap tar tat tba tbb tbd tbe tbm tbp tbr tbt tda tdb tdd tde tdm tdp tdr tdt te- tea teb ted tee tem tep ter tet tma tmb tmd tme tmm tmp tmr tmt tpa tpb tpd tpe tpm tpp tpr tpt tra trb trd tre trm trp trr trt tta ttb ttd tte ttm ttp ttr ttt