-er a-a a-b a-c aaa aab aac aae aag aap aar ab- aba abb abc abe abg abp abr ac- aca acb acc ace acg acp acr aea aeb aec aee aeg aep aer ag- aga agb agc age agg agp agr ap- apa apb apc ape apg app apr ar- ara arb arc are arg arp arr b-p baa bab bac bae bag bap bar bba bbb bbc bbe bbg bbp bbr bca bcb bcc bce bcg bcp bcr be- bea beb bec bee beg bep ber bga bgb bgc bge bgg bgp bgr bpa bpb bpc bpe bpg bpp bpr bra brb bre brg brp brr c-- caa cab cac cae cag cap car cba cbb cbc cbe cbg cbp cbr cca ccb ccc cce ccg ccp ccr ce- cea ceb cec cee ceg cep cer cga cgb cgc cge cgg cgp cgr cpa cpb cpc cpe cpg cpp cpr cra crb crc cre crg crp crr eaa eab eac eae eag eap ear eba ebb ebc ebe ebg ebp ebr ec- eca ecb ecc ece ecg ecr eea eeb eec eee eeg eep eer ega egb egc ege egg egp egr ep- epa epb epc epe epg epp epr era erb erc ere erg erp err g-p gaa gab gac gae gag gap gar gba gbc gbe gbg gbp gbr gca gcb gcc gce gcg gcp gcr ge- gea geb gec gee geg gep ger gga ggb ggc ggg ggp ggr gpa gpb gpc gpe gpg gpp gpr gra grb grc gre grg grp grr p-p paa pab pac pae pag pap par pba pbb pbc pbe pbg pbp pbr pca pcb pcc pce pcg pcp pcr pea peb pec pee peg pep per pga pgb pgc pge pgg pgp pgr ppa ppb ppc ppe ppg ppp ppr pra prb prc pre prg prp prr ra- raa rab rac rae rag rap rar rba rbb rbc rbe rbg rbp rbr rca rcb rcc rce rcg rcp rcr re- rea reb rec ree reg rep rer rga rgb rgc rge rgg rgp rgr rpa rpb rpc rpe rpg rpp rpr rra rrb rrc rrg rrp rrr

a-be aaaa aaab aaac aaae aaap aaar aaba aabb aabc aabp aaca aacb aacc aace aacp aacr aaea aaec aaep aage aapa aapc aara aarc aare aarp abaa abab abac abae abag abap abar abb- abba abbb abbe abbr abca abcb abcc abcp abcr abec abee aber abpa abpc abpp abpr abra abrc acaa acab acac acae acag acap acar acba acca accc acce accp ace- acea acec acer acga acgr acpa acpe acpr acr- acra acrc acre acrr aeac aeap aecb aeer aega aer- aera aerc agac agag agap agar agba agca agcc agce agea agee agep ager agga agge agra agre agrp apac apap apar apba apbg apbr apca apcb apcc apcr apea apec apeg apep aper apga appa appc appr apra aprc apre arab arac arae arag arap arar arba arbe arc- arca arce area arec aree areg arep arga argb arge arpa arpe arr- arra arrc arre arrg arrr baaa baar baba babb babe babr bac- baca bacc bace baer baga bage bagg bapa bapc bape bapp bar- bara barb barc bare barg barr bbbb bbeb bbga bbpr bbrc bbrg bcaa bcap bcar bcbc bcbg bcbp bcca bccc bcec bcer bcpp bcra beag beap bear beba bebb bebe beca beeb beeg beep beer bega begg bera berc bere berg berr bgca bpcp bpea bprc brab brac brae brag brca brcb brce brea breb brec bree breg brep brer brrr caaa caab caac caap caba cabe cabg cac- caca cacc cace cacr caec caer caga cage cagg cagr capa capb capc cape capp cara carb carc care carp carr cbac cbar cbbc cbca cbcc cbce cbcp cbcr cbea cbec cbee cber cbga cbgb cbpc cbpp cbre ccaa ccab ccac ccag ccap ccar ccba ccbc ccca cccb cccc cccp ccee ccga ccgc ccpa ccpe ccpp ccpr ccra ccrc ccre ccrg ccrp ceac cear ceba cebp cec- ceca cece cecp ceeb ceec cege cepa cepc cepe cepp cepr cer- cera cerc cere cerp cgac cgap cgcc cgcg cger cpaa cpac cpag cpap cpbc cpca cpce cpea cpeb cpep cper cpga cpgb cppa cpre crab crac crag crap crar crbc crca crcc crce crcr cre- crea creb crec cree creg crep crpc eaba eaca eacc eaec eaga eage eapc eapp eara earb eare earp ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecpa ecpg ecpp ecra ecrc ecrr eeca eeea eeee eega eera eerc eerg egaa egae egar egba egbe egcc egcg egcr egea egec egee eger eggb egge eggp egpa egpb egpe egra egre epaa epac epcc epec epee eper eppa eppc eppp epra eprb eprp erap erba erbb erbe erca ercc erce ercp ereb erec erer erg- erga ergg erpa erpe erra errc erre gaap gaar gaba gabb gabe gabp gabr gace gaea gaec gaer gaga gage gagg gapa gape gapp gara garb gare garg garp garr gbag gbap gc-c gcaa gcap gcbc gccc gcpc gcrg geab gear geba gebe geca gece geep geer gege gegg gepa gepe gera gerb gere gggg gpaa gpac gpca gper gpgp gpra gprp grab grac grae grap grbr grcc grce grea greb grec gree greg grep grpc grrr paag paap paar paba paca pace paea paec paep paer paga pagb page papa papb pape papg papp papr par- para parc pare parg parp parr pbac pbar pbcc pbgc pbpa pcaa pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcer pcgg pcpb pcpp pcra pcrc pcre peab peac peag peap pear peba peca pece pecr peec peep peer pega pegg pepa pepe per- pera perc pere perg perp perr pgaa pgcc pgce pger pgrc ppac ppap ppar ppcc pper ppga pppa pppp pprc prae prag prar prbc prca prcc prcp pre- preb prec pree preg prep raab raag raba rabb rabe rac- raca racc race raec raeg raep raer raga rage ragg rapa rapc rape rapp rara