-al -er a-a a-b a-c a-t aaa aab aac aae aal aar aat ab- aba abb abc abe abl abr abt ac- aca acb acc ace acl acr act aea aeb aec aee ael aer aet al- ala alb alc ale all alr alt ar- ara arb arc are arl arr art at- ata atb atc ate atl atr att baa bab bac bae bal bar bat bba bbb bbc bbe bbl bbr bbt bca bcb bcc bce bcl bcr bct be- bea beb bec bee bel ber bet bla blb blc ble bll blr blt bra brb bre brl brr brt bta btb btc bte btl btr btt c-- caa cab cac cae cal car cat cba cbb cbc cbe cbl cbr cbt cca ccb ccc cce ccl ccr cct ce- cea ceb cec cee cel cer cet cl- cla clb clc cle cll clr clt cra crb crc cre crl crr crt cta ctb ctc cte ctl ctr ctt eaa eab eac eae eal ear eat eba ebb ebc ebe ebl ebr ebt ec- eca ecb ecc ece ecl ecr ect eea eeb eec eee eel eer eet ela elb elc ele ell elr elt era erb erc ere erl err ert eta etb etc ete etl etr ett la- laa lab lac lae lal lar lat lba lbb lbc lbe lbl lbr lbt lca lcb lcc lce lcl lcr lct lea leb lec lee lel ler let lla llb llc lle lll llr llt lra lrb lrc lrr lrt lta ltb ltc lte ltl ltr ltt ra- raa rab rac rae ral rar rat rba rbb rbc rbe rbl rbr rbt rca rcb rcc rce rcl rcr rct re- rea reb rec ree rel rer ret rla rlc rle rll rlr rlt rra rrb rrc rrl rrr rrt rta rtb rtc rte rtl rtr rtt taa tab tac tae tal tar tat tba tbb tbc tbe tbl tbr tbt tca tcb tcc tce tcl tcr tct te- tea teb tec tee tel ter tet tla tlc tle tll tlr tlt tra trb trc tre trl trr trt tta ttb ttc tte ttl ttr ttt

a-be aaaa aaab aaac aaae aaal aaar aaba aabb aabc aabl aabt aaca aacb aacc aace aacl aacr aact aaea aaec aala aalc aale aall aara aarc aare aart aata aatc aatt abaa abab abac abae abal abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcl abcr abct abec abee abel aber abet abla able abra abrc abta ac-t acaa acab acac acae acar acat acba acbl acca accc acce acct ace- acea acec acel acer acet acla aclc acle aclr acr- acra acrc acre acrr acta actc acte actl actt aeac aecb aecl aect aeer aela aelc aer- aera aerc aeta aetc aetr aett alaa alac alae alal alar alat alb- alba albc albe alca alcc alce alea alec alee aler alet all- alla alle alll allr alta alte arab arac arae aral arar arat arba arbe arc- arca arce arct area arec aree arel aret arla arle arr- arra arrc arre arrr arrt arta artc arte artr at-l at-t ataa atab atac atae atal atar atat atca atcc atcl atcr atea atec atee atel ater atla atle atra atrc atre atta atte attr baaa baal baar baat baba babb babe babr bac- baca bacc bace bact bael baer bala balc bale ball balt bar- bara barb barc bare barr bart bata batc bate batt bbbb bbeb bbet bblb bbrc bcaa bcar bcat bcbc bcca bccc bccl bcec bcer bcet bcra bctc beal bear beat beba bebb bebe beca beeb beel beer beet bela bele bell belt bera berc bere berr bert beta betc bete bett blaa blab blac blae blat blbt blea bleb blee blet blrc brab brac brae brat brca brcb brce brea breb brec bree brel brer bret brrr brtc btaa btcc btcl btec btla btrc btrt bttb caaa caab caac caal caat caba cabe cac- caca cacc cace cacr caec caer cala calc cale call calt cara carb carc care carl carr cart cat- cata catb catc cate catt cbac cbal cbar cbat cbbc cbca cbcc cbce cbcl cbcr cbct cbea cbec cbee cber cbet cblb cblc cbre cbrl cbrt cbta cbtc cbtl ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc ccra ccrc ccre ccrl ccrt cctb cctc cctl cctt ceac ceal cear ceat ceba cec- ceca cece cect ceeb ceec ceel cel- cela celc cele cell celt cer- cera cerc cere cerl cert cet- ceta cete clab clar clat clea clec clee cler clet clra cltb cltc crab crac crar crat crbc crca crcc crce crcr cre- crea creb crec cree cret crrt crtc crtl ctab ctae ctal ctba ctca ctec ctle ctrc ctrl ctta e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl eart eata eate ebac ebal ebba ebbc ebbr ebcc ebel eber ebla ecaa ecac ecal ecar ecat ecbc ecbe ecca eccb eccc ecce eccl ecct ecla eclt ecra ecrc ecrl ecrr ect- ecta ectc eeca eeea eeee eele eera eerc eeta eetc eete el-b elab elac elal elar elat elba elbe elca elcb elce elea elec elee eler elet ella elle elra elta elte eral erat erba erbb erbe erca ercc erce ereb erec erel erer eret erla erle erll erra errc erre erta ertl etal etat etbc etbr etcc etec etee etel eter etla etra etre etta ette laaa laac laal laar laat laba labe labr laca lacc lace lacl lact lael laer laet lala lale lall lara larb larc lare larr lart lata latc late latt lbar lbcc lblr lbrt lcac lcat lcbc lcca lccc lcce lcer lcra lcrl lctl leaa leal lear leat leba leca lece lect leea leel leer leet lela lele lell lera lerc lere lert leta lete lett llat llcc llet lllc llll lrac lral lrat lrba lrrc lrrr lrta ltac ltae ltbl ltcc ltee ltra lttc lttr raab raat raba rabb rabe