-er a-a a-b aaa aab aad aae aam aao aap aar aas ab- aba abb abd abe abm abo abp abr abs ad- ada adb add ade adm ado adp adr ads aea aeb aed aee aem aeo aep aer aes ama amb amd ame amm amo amp amr ams aoa aob aod aoe aom aoo aop aor aos ap- apa apb apd ape apm apo app apr aps ar- ara arb ard are arm aro arp arr ars as- asa asb asd ase asm aso asp asr ass b-p baa bab bad bae bam bao bap bar bas bba bbb bbd bbe bbm bbo bbp bbr bbs bda bdb bdd bde bdm bdo bdp bdr bds be- bea beb bed bee bem beo bep ber bes bma bmb bmd bme bmm bmo bmp bmr bms boa bob bod boe bom boo bop bor bos bpa bpb bpd bpe bpm bpo bpp bpr bps bra brb brd bre brm bro brp brr brs bsa bsb bsd bse bsm bso bsp bsr bss daa dab dad dae dam dao dap dar das dba dbb dbd dbe dbm dbo dbp dbr dbs dda ddb ddd dde ddm ddo ddp ddr dds de- dea deb ded dee dem deo dep der des dma dmb dmd dme dmm dmo dmp dmr dms doa dob dod doe dom doo dop dor dos dpa dpb dpd dpe dpm dpo dpp dpr dps dra drb drd dre drm dro drp drr drs dsa dsb dsd dse dsm dso dsp dsr dss eaa eab ead eae eam eao eap ear eas eba ebb ebd ebe ebm ebo ebp ebr ebs ed- eda edb edd ede edm edo edp edr eds eea eeb eed eee eem eeo eep eer ees em- ema emb emd eme emm emo emp emr ems eo- eoa eob eod eoe eom eoo eop eor eos ep- epa epb epd epe epm epo epp epr eps era erb erd ere erm ero erp err ers es- esa esb esd ese esm eso esp esr ess m-o m-r maa mab mad mae mam mao map mar mas mba mbb mbd mbe mbm mbo mbp mbr mbs mda mdb mdd mde mdm mdo mdp mdr mds mea meb med mee mem meo mep mer mes mma mmb mmd mme mmm mmo mmp mmr mms moa mob mod moe mom moo mop mor mos mpa mpb mpd mpe mpm mpo mpp mpr mps mra mrb mrd mre mrm mro mrp mrr mrs msa msb msd mse msm mso msp msr mss oaa oab oad oae oam oao oap oar oas ob- oba obb obd obe obm obo obp obr obs oda odb odd ode odm odo odp odr ods oea oeb oed oee oem oeo oep oer oes om- oma omb omd ome omm omo omp omr oms oo- ooa oob ood oom ooo oop oor oos op- opa opb opd ope opm opo opp opr ops or- ora orb ord ore orm oro orp orr ors os- osa osb osd ose osm oso osp osr oss p-p paa pab pad pae pam pao pap par pas pba pbb pbd pbe pbm pbo pbp pbr pbs pda pdb pdd pde pdm pdo pdp pdr pds pea peb ped pee pem peo pep per pes pma pmb pmd pme pmm pmo pmp pmr pms poa pob pod poe pom poo pop por pos ppa ppb ppd ppe ppm ppo ppp ppr pps pra prb prd pre prm pro prp prr prs ps- psa psb psd pse psm pso psp psr pss ra- raa rab rad rae ram rao rap rar ras rba rbb rbd rbe rbm rbo rbp rbr rbs rda rdb rdd rde rdm rdo rdp rdr rds re- rea reb red ree rem reo rep rer res rma rmb rmd rme rmm rmo rmp rmr rms roa rob rod roe rom roo rop ror ros rpa rpb rpd rpe rpm rpo rpp rpr rps rra rrb rrd rrm rrp rrr rrs rsa rsb rsd rse rsm rso rsp rsr rss saa sab sad sae sam sao sap sar sas sba sbb sbd sbe sbm sbo sbp sbr sbs sda sdb sdd sde sdm sdo sdp sdr sds se- sea seb sed see sem seo sep ser ses sma smb smd sme smm smo smp smr sms soa sob sod soe som soo sop sor sos spa spb spd spe spm spo spp spr sps sr- sra srb srd sre srm sro srp srr srs ss- ssa ssb ssd sse ssm sso ssp ssr sss