-er a-a a-b a-c a-t aaa aab aac aae aak aap aar aat ab- aba abb abc abe abk abp abr abt ac- aca acb acc ace ack acp acr act aea aeb aec aee aek aep aer aet aka akb akc ake akk akp akr ap- apa apb apc ape apk app apr apt ar- ara arb arc are ark arp arr art at- ata atb atc ate atp atr att b-p baa bab bac bae bak bap bar bat bba bbb bbc bbe bbk bbp bbr bbt bca bcb bcc bce bck bcp bcr bct be- bea beb bec bee bek bep ber bet bka bkb bkc bke bkk bkp bkr bkt bpa bpb bpc bpe bpp bpr bpt bra brb bre brk brp brr brt bta btb btc bte btk btp btr btt c-- caa cab cac cae cak cap car cat cba cbb cbc cbe cbk cbp cbr cbt cca ccb ccc cce cck ccp ccr cct ce- cea ceb cec cee cek cep cer cet cka ckb ckc ckt cpa cpb cpc cpe cpk cpp cpr cpt cra crb crc cre crk crp crr crt cta ctb ctc cte ctk ctp ctr ctt eaa eab eac eae eak eap ear eat eba ebb ebc ebe ebk ebp ebr ebt ec- eca ecb ecc ece eck ecr ect eea eeb eec eee eek eep eer eet eka ekb ekc eke ekp ekr ekt ep- epa epb epc epe epp epr ept era erb erc ere erk erp err ert eta etb etc ete etk etp etr ett k-t ka- kaa kab kac kae kak kap kar kat kba kbb kbc kbe kbk kbp kbr kca kcb kcc kce kck kcp kcr kct ke- kea keb kec kee kek kep ker ket kkb kkc kke kkk kkp kkr kkt kpa kpc kpe kpk kpp kpr kpt kra krc krk krp krr krt kta ktb ktc kte ktk ktp ktr ktt p-p paa pab pac pae pak pap par pat pba pbb pbc pbe pbk pbp pbr pbt pca pcb pcc pce pck pcp pcr pct pea peb pec pee pek pep per pet pka pkb pkc pke pkp pkr pkt ppa ppb ppc ppe ppk ppp ppr ppt pra prb prc pre prk prp prr prt pt- pta ptb ptc pte ptk ptp ptr ptt ra- raa rab rac rae rak rap rar rat rba rbb rbc rbe rbk rbp rbr rbt rca rcb rcc rce rcp rcr rct re- rea reb rec ree rek rep rer ret rkb rkc rke rkk rkp rkt rpa rpb rpc rpe rpk rpp rpr rpt rra rrb rrc rrk rrp rrr rrt rta rtb rtc rte rtk rtp rtr rtt taa tab tac tae tak tap tar tat tba tbb tbc tbe tbk tbp tbr tbt tca tcb tcc tce tck tcp tcr tct te- tea teb tec tee tek tep ter tet tka tkb tkc tke tkk tkp tkr tkt tpa tpb tpc tpe tpk tpp tpr tpt tra trb trc tre trk trp trr trt tta ttb ttc tte ttk ttp ttr ttt

a-ak a-be aaaa aaab aaac aaae aaap aaar aaba aabb aabc aabp aabt aaca aacb aacc aace aack aacp aacr aact aaea aaec aaep aaka aake aapa aapc aapt aara aarc aare aarp aart aata aatc aatk aatt abaa abab abac abae abak 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 acap acar acat acba acca accc acce accp acct ace- acea acec acek acer acet acke acpa acpe acpr acpt acr- acra acrc acre acrr acta actc acte actt aeac aeap aecb aect aeer aeka aer- aera aerc aeta aetc aetr aett akaa akae akap akar akca akee aker akka akr- akra akre akte apac apak apap apar apat apba apbr apca apcb apcc apcr apea apec apep aper apet apke appa appc appr appt apra aprc apre aprt apta aptc apte aptt arab arac arae arak arap arar arat arba arbe arc- arca arce arct area arec aree arek arep aret arka arke arpa arpe arr- arra arrc arre arrk arrr arrt arta artc arte artr at-t ataa atab atac atae atak atap atar atat atca atcc atck atcr atea atec atee atep ater atka atkt atpr atra atrc atre atrk atrp atta atte attp attr baaa baak baar baat baba babb babe babr bac- baca bacc bace back bact baek baer bak- baka bake bakr bakt bapa bapc bape bapp bapt bar- bara barb barc bare bark barr bart bata batc bate batt bbbb bbeb bbet bbpr bbrc bcaa bcap bcar bcat bcbc bcbp bcca bccc bcec bcer bcet bcpp bcra bctc beak beap bear beat beba bebb bebe beca beck beeb beek beep beer beet beka beke bera berc bere berk berr bert beta betc bete bett bkpr bkpt bpcp bpea bprc brab brac brae brak brat brca brcb brce brea breb brec bree brek brep brer bret brka brkb brrr brtc btaa btbp btcc btec btek btrc btrt bttb caaa caab caac caap caat caba cabe cac- caca cacc cace cack cacr caec caer caka cake capa capb capc cape capp capt cara carb carc care cark carp carr cart cat- cata catb catc cate catt cbac cbar cbat cbbc cbca cbcc cbce cbcp cbcr cbct cbea cbec cbee cber cbet cbka cbkr cbpc cbpp cbre cbrt cbta cbtc ccaa ccab ccac ccap ccar ccat ccba ccbc ccca cccb cccc cccp ccee ccpa ccpe ccpp ccpr ccra ccrc ccre ccrp ccrt cctb cctc cctt ceac cear ceat ceba cebp cec- ceca cece cecp cect ceeb ceec ceke cepa cepc cepe cepp cepr cept cer- cera cerc cere cerp cert cet- ceta cete cetp ckac ckat ckbc ckbe ckck cker ckpc ckpr ckrc cktb cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cper cppa cpre cprt cptp cptr crab crac crap crar crat crbc crca crcc crce