-er a-a a-b aaa aab aad aae aam aap aar ab- aba abb abd abe abm abp abr ad- ada adb add ade adm adp adr aea aeb aed aee aem aep aer ama amb amd ame amm amp amr ap- apa apb apd ape apm app apr ar- ara arb ard are arm arp arr b-p baa bab bad bae bam bap bar bba bbb bbd bbe bbm bbp bbr bda bdb bdd bde bdm bdp bdr be- bea beb bed bee bem bep ber bma bmb bmd bme bmm bmp bmr bpa bpb bpd bpe bpm bpp bpr bra brb brd bre brm brp brr daa dab dad dae dam dap dar dba dbb dbd dbe dbm dbp dbr dda ddb ddd dde ddm ddp ddr de- dea deb ded dee dem dep der dma dmb dmd dme dmm dmp dmr dpa dpb dpd dpe dpm dpp dpr dra drb drd dre drm drp drr eaa eab ead eae eam eap ear eba ebb ebd ebe ebm ebp ebr ed- eda edb edd ede edm edp edr eea eeb eed eee eem eep eer em- ema emb emd eme emm emp emr ep- epa epb epd epe epm epp epr era erb erd ere erm erp err m-r maa mab mad mae mam map mar mba mbb mbd mbe mbm mbp mbr mda mdb mdd mde mdm mdp mdr mea meb med mee mem mep mer mma mmb mmd mme mmm mmp mmr mpa mpb mpd mpe mpm mpp mpr mra mrb mrd mre mrm mrp mrr p-p paa pab pad pae pam pap par pba pbb pbd pbe pbm pbp pbr pda pdb pdd pde pdm pdp pdr pea peb ped pee pem pep per pma pmb pmd pme pmm pmp pmr ppa ppb ppd ppe ppm ppp ppr pra prb prd pre prm prp prr ra- raa rab rad rae ram rap rar rba rbb rbd rbe rbm rbp rbr rda rdb rdd rde rdm rdp rdr re- rea reb red ree rem rep rer rma rmb rmd rme rmm rmp rmr rpa rpb rpd rpe rpm rpp rpr rra rrb rrd rrm rrp rrr