a-be aaaa aaab aaac aaae aaap aaar aaba aabb aabc aabp aaca aacb aacc aace aacp aacr aaea aaec aaep aapa aapc aara aarc aare aarp abaa abab abac abae 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 acap acar acba acca accc acce accp ace- acea acec acer acpa acpe acpr acr- acra acrc acre acrr aeac aeap aecb aeer aer- aera aerc apac apap apar apba apbr apca apcb apcc apcr apea apec apep aper appa appc appr apra aprc apre arab arac arae arap arar arba arbe arc- arca arce area arec aree arep arpa arpe arr- arra arrc arre arrr baaa baar baba babb babe babr bac- baca bacc bace baer bapa bapc bape bapp bar- bara barb barc bare barr bbbb bbeb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcec bcer bcpp bcra beap bear beba bebb bebe beca beeb beep beer bera berc bere berr bpcp bpea bprc brab brac brae brca brcb brce brea breb brec bree brep brer brrr caaa caab caac caap caba cabe cac- caca cacc cace cacr caec caer capa capb capc cape capp cara carb carc care carp carr cbac cbar cbbc cbca cbcc cbce cbcp cbcr cbea cbec cbee cber cbpc cbpp cbre ccaa ccab ccac ccap ccar ccba ccbc ccca cccb cccc cccp ccee ccpa ccpe ccpp ccpr ccra ccrc ccre ccrp ceac cear ceba cebp cec- ceca cece cecp ceeb ceec cepa cepc cepe cepp cepr cer- cera cerc cere cerp cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cper cppa cpre crab crac crap crar crbc crca crcc crce crcr cre- crea creb crec cree crep crpc eaba eaca eacc eaec eapc eapp eara earb eare earp ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecpa ecpp ecra ecrc ecrr eeca eeea eeee eera eerc epaa epac epcc epec epee eper eppa eppc eppp epra eprb eprp erap erba erbb erbe erca ercc erce ercp ereb erec erer erpa erpe erra errc erre paap paar paba paca pace paea paec paep paer papa papb pape papp papr par- para parc pare parp parr pbac pbar pbcc pbpa pcaa pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcer pcpb pcpp pcra pcrc pcre peab peac peap pear peba peca pece pecr peec peep peer pepa pepe per- pera perc pere perp perr ppac ppap ppar ppcc pper pppa pppp pprc prae prar prbc prca prcc prcp pre- preb prec pree prep raab raba rabb rabe rac- raca racc race raec raep raer rapa rapc rape rapp rara rarb rare rbbb rbbr rcac rcbc rccb rccc rcep rea- reac reae reap rear reba rebb rebe reca recc rece recp recr reeb reep repe repp repr rera rere rpca rrrr