-er a-a a-b a-c a-t aaa aab aac aae aag aao aap aar aat ab- aba abb abc abe abg abo abp abr abt ac- aca acb acc ace acg aco acp acr act aea aeb aec aee aeg aeo aep aer aet ag- aga agb agc age agg ago agp agr agt aoa aob aoc aoe aog aoo aop aor aot ap- apa apb apc ape apg apo app apr apt ar- ara arb arc are arg aro arp arr art at- ata atb atc ate atg ato atp atr att b-p baa bab bac bae bag bao bap bar bat bba bbb bbc bbe bbg bbo bbp bbr bbt bca bcb bcc bce bcg bco bcp bcr bct be- bea beb bec bee beg beo bep ber bet bga bgb bgc bge bgg bgo bgp bgr bgt boa bob boc boe bog boo bop bor bot bpa bpb bpc bpe bpg bpo bpp bpr bpt bra brb bre brg bro brp brr brt bta btb btc bte btg bto btp btr btt c-- caa cab cac cae cag cao cap car cat cba cbb cbc cbe cbg cbo cbp cbr cbt cca ccb ccc cce ccg cco ccp ccr cct ce- cea ceb cec cee ceg ceo cep cer cet cga cgb cgc cge cgg cgo cgp cgr cgt co- coa cob coc coe cog coo cop cor cot cpa cpb cpc cpe cpg cpo cpp cpr cpt cra crb crc cre crg cro crp crr crt cta ctb ctc cte ctg cto ctp ctr ctt eaa eab eac eae eag eao eap ear eat eba ebb ebc ebe ebg ebo ebp ebr ebt ec- eca ecb ecc ece ecg eco ecr ect eea eeb eec eee eeg eeo eep eer eet ega egb egc ege egg ego egp egr egt eo- eoa eob eoc eoe eog eoo eop eor eot ep- epa epb epc epe epg epo epp epr ept era erb erc ere erg ero erp err ert eta etb etc ete etg eto etp etr ett g-p gaa gab gac gae gag gao gap gar gat gba gbc gbe gbg gbo gbp gbr gbt gca gcb gcc gce gcg gco gcp gcr gct ge- gea geb gec gee geg geo gep ger get gga ggb ggc ggg ggo ggp ggr ggt goa gob goc goe gog goo gop gor got gpa gpb gpc gpe gpg gpo gpp gpr gpt gra grb grc gre grg gro grp grr grt gta gtb gtc gte gtg gto gtp gtr gtt oaa oab oac oae oag oao oap oar oat ob- oba obb obc obe obg obo obp obr obt oc- oca ocb occ ocg oco ocp ocr oct oea oeb oec oee oeg oeo oep oer oet oga ogc oge ogg ogo ogp ogt oo- ooa oob ooc oog ooo oop oor oot op- opa opb opc ope opg opo opp opr opt or- ora orb orc ore org oro orp orr ort ot- ota otb otc ote otg oto otp otr ott p-p paa pab pac pae pag pao pap par pat pba pbb pbc pbe pbg pbo pbp pbr pbt pca pcb pcc pce pcg pco pcp pcr pct pea peb pec pee peg peo pep per pet pga pgb pgc pge pgg pgo pgp pgr pgt poa pob poc poe pog poo pop por pot ppa ppb ppc ppe ppg ppo ppp ppr ppt pra prb prc pre prg pro prp prr prt pt- pta ptb ptc pte ptg pto ptp ptr ptt ra- raa rab rac rae rag rao rap rar rat rba rbb rbc rbe rbg rbo rbp rbr rbt rca rcb rcc rce rcg rco rcp rcr rct re- rea reb rec ree reg reo rep rer ret rga rgb rgc rge rgg rgo rgp rgr rgt roa rob roc roe rog roo rop ror rot rpa rpb rpc rpe rpg rpo rpp rpr rpt rra rrb rrc rrg rrp rrr rrt rta rtb rtc rte rtg rto rtp rtr rtt taa tab tac tae tag tao tap tar tat tba tbb tbc tbe tbg tbo tbp tbr tbt tca tcb tcc tce tcg tco tcp tcr tct te- tea teb tec tee teg teo tep ter tet tga tgb tgc tge tgg tgo tgp tgr tgt to- toa tob toc toe tog too top tor tot tpa tpb tpc tpe tpg tpo tpp tpr tpt tra trb trc tre trg tro trp trr trt tta ttb ttc tte ttg tto ttp ttr ttt

a-be aaaa aaab aaac aaae aaap aaar aaba aabb aabc aabp aabt aaca aacb aacc aace aaco aacp aacr aact aaea aaec aaep aage aaoe aaoo aapa aapc aapo aapt aara aarc aare aaro aarp aart aata aatc aatt abaa abab abac abae abag abap abar abat abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcp abcr abct abec abee aber abet aboa abob aboo abor abot abpa abpc abpp abpr abra abrc abro abta ac-t acaa acab acac acae acag acap acar acat acba acca accc acce acco accp acct ace- acea acec acer acet acga acgr acoa acoe acog acop acor acot acpa acpe acpr acpt acr- acra acrc acre acro acrr acta actc acte actg acto actt aeac aeap aecb aect aeer aega aer- aera aerc aero aeta aetc aeto aetr aett ag-o agac agag agao agap agar agat agba agbo agca agcc agce agco agct agea agee agep ager aget agga agge agob agog agoo agot agra agre agro agrp agta agte agtr aoba aoca aoce aopo aora aorb aort aotc apac apao apap apar apat apba apbg apbr apca apcb apcc apco apcr apea apec apeg apep aper apet apga apo- apoc apoe apoo apop apor apot appa appc appr appt apra aprc apre apro aprt apta aptc apte aptt arab arac arae arag arap arar arat arba arbe arc- arca arce arco arct area arec aree areg areo arep aret arga argb arge argo aroa arob aroe aroo aror arpa