-er a-a a-b a-c a-t aaa aab aac aae aag aap aar aat ab- aba abb abc abe abg abp abr abt ac- aca acb acc ace acg acp acr act aea aeb aec aee aeg aep aer aet ag- aga agb agc age agg agp agr agt ap- apa apb apc ape apg app apr apt ar- ara arb arc are arg arp arr art at- ata atb atc ate atg atp atr att b-p baa bab bac bae bag bap bar bat bba bbb bbc bbe bbg bbp bbr bbt bca bcb bcc bce bcg bcp bcr bct be- bea beb bec bee beg bep ber bet bga bgb bgc bge bgg bgp bgr bgt bpa bpb bpc bpe bpg bpp bpr bpt bra brb bre brg brp brr brt bta btb btc bte btg btp btr btt c-- caa cab cac cae cag cap car cat cba cbb cbc cbe cbg cbp cbr cbt cca ccb ccc cce ccg ccp ccr cct ce- cea ceb cec cee ceg cep cer cet cga cgb cgc cge cgg cgp cgr cgt cpa cpb cpc cpe cpg cpp cpr cpt cra crb crc cre crg crp crr crt cta ctb ctc cte ctg ctp ctr ctt eaa eab eac eae eag eap ear eat eba ebb ebc ebe ebg ebp ebr ebt ec- eca ecb ecc ece ecg ecr ect eea eeb eec eee eeg eep eer eet ega egb egc ege egg egp egr egt ep- epa epb epc epe epg epp epr ept era erb erc ere erg erp err ert eta etb etc ete etg etp etr ett g-p gaa gab gac gae gag gap gar gat gba gbc gbe gbg gbp gbr gbt gca gcb gcc gce gcg gcp gcr gct ge- gea geb gec gee geg gep ger get gga ggb ggc ggg ggp ggr ggt gpa gpb gpc gpe gpg gpp gpr gpt gra grb grc gre grg grp grr grt gta gtb gtc gte gtg gtp gtr gtt p-p paa pab pac pae pag pap par pat pba pbb pbc pbe pbg pbp pbr pbt pca pcb pcc pce pcg pcp pcr pct pea peb pec pee peg pep per pet pga pgb pgc pge pgg pgp pgr pgt ppa ppb ppc ppe ppg ppp ppr ppt pra prb prc pre prg prp prr prt pt- pta ptb ptc pte ptg ptp ptr ptt ra- raa rab rac rae rag rap rar rat rba rbb rbc rbe rbg rbp rbr rbt rca rcb rcc rce rcg rcp rcr rct re- rea reb rec ree reg rep rer ret rga rgb rgc rge rgg rgp rgr rgt rpa rpb rpc rpe rpg rpp rpr rpt rra rrb rrc rrg rrp rrr rrt rta rtb rtc rte rtg rtp rtr rtt taa tab tac tae tag tap tar tat tba tbb tbc tbe tbg tbp tbr tbt tca tcb tcc tce tcg tcp tcr tct te- tea teb tec tee teg tep ter tet tga tgb tgc tge tgg tgp tgr tgt tpa tpb tpc tpe tpg tpp tpr tpt tra trb trc tre trg trp trr trt tta ttb ttc tte ttg ttp ttr ttt

a-be aaaa aaab aaac aaae aaap aaar aaba aabb aabc aabp aabt aaca aacb aacc aace aacp aacr aact aaea aaec aaep aage aapa aapc aapt aara aarc aare aarp aart aata aatc aatt abaa abab abac abae abag abap abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcp abcr abct abec abee aber abet abpa abpc abpp abpr abra abrc abta ac-t acaa acab acac acae acag acap acar acat acba acca accc acce accp acct ace- acea acec acer acet acga acgr acpa acpe acpr acpt acr- acra acrc acre acrr acta actc acte actg actt aeac aeap aecb aect aeer aega aer- aera aerc aeta aetc aetr aett agac agag agap agar agat agba agca agcc agce agct agea agee agep ager aget agga agge agra agre agrp agta agte agtr apac apap apar apat apba apbg apbr apca apcb apcc apcr apea apec apeg apep aper apet apga appa appc appr appt apra aprc apre aprt apta aptc apte aptt arab arac arae arag arap arar arat arba arbe arc- arca arce arct area arec aree areg arep aret arga argb arge arpa arpe arr- arra arrc arre arrg arrr arrt arta artc arte artr at-t ataa atab atac atae atap atar atat atca atcc atcr atea atec atee atep ater atpr atra atrc atre atrp atta atte attp attr baaa baar baat baba babb babe babr bac- baca bacc bace bact baer baga bage bagg bagt bapa bapc bape bapp bapt bar- bara barb barc bare barg barr bart bata batc bate batt bbbb bbeb bbet bbga bbpr bbrc bbrg bcaa bcap bcar bcat bcbc bcbg bcbp bcca bccc bcec bcer bcet bcpp bcra bctc beag beap bear beat beba bebb bebe beca beeb beeg beep beer beet bega begg bera berc bere berg berr bert beta betc bete bett bgca bpcp bpea bprc brab brac brae brag brat brca brcb brce brea breb brec bree breg brep brer bret brrr brtc btaa btbp btcc btec btrc btrt bttb caaa caab caac caap caat caba cabe cabg cac- caca cacc cace cacr caec caer caga cage cagg cagr capa capb capc cape capp capt cara carb carc care carp carr cart cat- cata catb catc cate catt cbac cbar cbat cbbc cbca cbcc cbce cbcp cbcr cbct cbea cbec cbee cber cbet cbga cbgb cbpc cbpp cbre cbrt cbta cbtc ccaa ccab ccac ccag ccap ccar ccat ccba ccbc ccca cccb cccc cccp ccee ccga ccgc ccgt ccpa ccpe ccpp ccpr ccra ccrc ccre ccrg ccrp ccrt cctb cctc cctt ceac cear ceat ceba cebp cec- ceca cece cecp cect ceeb ceec cege cepa cepc cepe cepp cepr cept cer- cera cerc cere cerp cert cet- ceta cete cetp cgac cgap cgcc cgcg cger cgtp cpaa cpac cpag cpap cpbc cpca