-er a-a a-b a-c aaa aab aac aad aae aam aap aar ab- aba abb abc abd abe abm abp abr ac- aca acb acc acd ace acm acp acr ad- ada adb adc add ade adm adp adr aea aeb aec aed aee aem aep aer ama amb amc amd ame amm amp amr ap- apa apb apc apd ape apm app apr ar- ara arb arc ard are arm arp arr b-p baa bab bac bad bae bam bap bar bba bbb bbc bbd bbe bbm bbp bbr bca bcb bcc bcd bce bcm bcp bcr bda bdb bdc bdd bde bdm bdp bdr be- bea beb bec bed bee bem bep ber bma bmb bmc bmd bme bmm bmp bmr bpa bpb bpc bpd bpe bpm bpp bpr bra brb brd bre brm brp brr c-- caa cab cac cad cae cam cap car cba cbb cbc cbd cbe cbm cbp cbr cca ccb ccc ccd cce ccm ccp ccr cda cdb cdc cdd cde cdm cdp cdr ce- cea ceb cec ced cee cem cep cer cma cmb cmc cmd cme cmm cmp cmr cpa cpb cpc cpd cpe cpm cpp cpr cra crb crc crd cre crm crp crr daa dab dac dad dae dam dap dar dba dbb dbc dbd dbe dbm dbp dbr dca dcb dcc dcd dce dcm dcp dcr dda ddb ddc ddd dde ddm ddp ddr de- dea deb dec ded dee dem dep der dma dmb dmc dmd dme dmm dmp dmr dpa dpb dpc dpd dpe dpm dpp dpr dra drb drc drd dre drm drp drr eaa eab eac ead eae eam eap ear eba ebb ebc ebd ebe ebm ebp ebr ec- eca ecb ecc ecd ece ecm ecr ed- eda edb edc edd ede edm edp edr eea eeb eec eed eee eem eep eer em- ema emb emc emd eme emm emp emr ep- epa epb epc epd epe epm epp epr era erb erc erd ere erm erp err m-r maa mab mac mad mae mam map mar mba mbb mbc mbd mbe mbm mbp mbr mc- mca mcb mcc mcd mce mcm mcp mcr mda mdb mdc mdd mde mdm mdp mdr mea meb mec med mee mem mep mer mma mmb mmc mmd mme mmm mmp mmr mpa mpb mpc mpd mpe mpm mpp mpr mra mrb mrc mrd mre mrm mrp mrr p-p paa pab pac pad pae pam pap par pba pbb pbc pbd pbe pbm pbp pbr pca pcb pcc pcd pce pcm pcp pcr pda pdb pdc pdd pde pdm pdp pdr pea peb pec ped pee pem pep per pma pmb pmc pmd pme pmm pmp pmr ppa ppb ppc ppd ppe ppm ppp ppr pra prb prc prd pre prm prp prr ra- raa rab rac rad rae ram rap rar rba rbb rbc rbd rbe rbm rbp rbr rca rcb rcc rcd rce rcm rcp rcr rda rdb rdc rdd rde rdm rdp rdr re- rea reb rec red ree rem rep rer rma rmb rmc rmd rme rmm rmp rmr rpa rpb rpc rpd rpe rpm rpp rpr rra rrb rrc rrd rrm rrp rrr

a-be aaaa aaab aaac aaad aaae aaam aaap aaar aaba aabb aabc aabd aabm aabp aaca aacb aacc aacd aace aacm aacp aacr aada aadc aade aaea aaec aaem aaep aama aamb aamc aamd aame aamp aamr aapa aapc aapm aara aarc aard aare aarm aarp abaa abab abac abad abae abam abap abar abb- abba abbb abbe abbr abca abcb abcc abcd abcp abcr abda abec abed abee aber abma abmb abmc abpa abpc abpd abpm abpp abpr abra abrc acaa acab acac acad acae acap acar acba acca accc accd acce accm accp acda acdb acdc acde acdm acdp ace- acea acec aced acem acer acma acmc acme acmp acpa acpd acpe acpm acpr acr- acra acrc acre acrm acrr adaa adab adac adad adae adam adap adar adba adbc adcc adda addc addd adde addr adea adeb adee adem ader adma admb adme admr adp- adra adre aeac aeap aecb aede aeer aer- aera aerc aerd amaa amac amad amae amam amap amar amb- amba ambe ambr amca amcc amda amec amed amee amer amm- amma amme ampa ampc ampd ampe ampm amra amrc apac apam apap apar apba apbr apca apcb apcc apcd apcm apcr apda apdd apea apec aped apem apep aper apma appa appc appd appr apra aprc apre arab arac arad arae aram arap arar arba arbe arc- arca arce arcm arda ardc arde ardm area arec ared aree arem arep arma armc armd arme armm arpa arpe arr- arra arrc arre arrr baaa baad baam baar baba babb babe babm babr bac- baca bacc bace bada badb badd bade badr baed baer bama bamb bamc bame bamm bamp bapa bapc bape bapp bar- bara barb barc bard bare barm barr bbad bbbb bbcm bbdd bbeb bbpr bbrc bcaa bcam bcap bcar bcbc bcbp bcca bccc bccm bcda bcde bcec bcer bcma bcmp bcpp bcra bd-r bdbc bddc bdpc bdrm bead beam beap bear beba bebb bebe beca beda bede beeb beed beem beep beer bema beme bera berc berd bere berm berr bmaa bmce bmdb bmdp bmep bpcp bpda bpea bpmc bprc bprd brab brac brad brae bram brca brcb brce brda brdm brea breb brec bred bree brem brep brer brmc brrm brrr c-cd caaa caab caac caam caap caba cabe cac- caca cacc cace cacm cacr cada cadc cadd cade cadm cadr caec caem caer cama camb camc came camm camp capa capb capc capd cape capm capp cara carb carc card care carm carp carr cbac cbar cbbc cbca cbcc cbce cbcm cbcp cbcr cbdb cbdc cbea cbec cbee cber cbme cbpc cbpp cbrd cbre cbrm ccaa ccab ccac ccad ccam ccap ccar ccba ccbc ccca cccb cccc cccm cccp ccdc ccdm ccdp ccdr cced ccee ccma ccmb ccmc ccmd ccmm ccmp ccpa ccpe ccpm ccpp ccpr