a-be aaaa aaab aaac aaae aaal aaar aaba aabb aabc aabl aaca aacb aacc aace aacl aacr aaea aaec aala aalc aale aall aara aarc aare abaa abab abac abae abal abar abax abb- abba abbb abbe abbr abca abcb abcc abcl abcr abec abee abel aber abla able abra abrc acaa acab acac acae acar acba acbl acca accc acce ace- acea acec acel acer acla aclc acle aclr acr- acra acrc acre acrr aeac aecb aecl aeer aela aelc aer- aera aerc alaa alac alae alal alar alb- alba albc albe alca alcc alce alea alec alee aler alex all- alla alle alll allr alxa arab arac arae aral arar arax arba arbe arc- arca arce area arec aree arel arex arla arle arr- arra arrc arre arrr axal axar axce axel axer axle ba-x baaa baal baar baba babb babe babr bac- baca bacc bace bael baer bala balc bale ball bar- bara barb barc bare barr barx bbbb bbeb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcec bcer bcra beal bear beba bebb bebe beca beeb beel beer bela bele bell bera berc bere berr blaa blab blac blae blea bleb blee blrc brab brac brae brax brca brcb brce brea breb brec bree brel brer brex brrr caaa caab caac caal caba cabe cac- caca cacc cace cacr caec caer caex cala calc cale call calx cara carb carc care carl carr carx caxa cbac cbal cbar cbax cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cber cblb cblc cbre cbrl cbxa ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc cclx ccra ccrc ccre ccrl ccxl ceac ceal cear ceba cec- ceca cece ceeb ceec ceel cel- cela celc cele cell cer- cera cerc cere cerl cexe clab clar clea clec clee cler clra clxx crab crac crar crax crbc crca crcc crce crcr cre- crea creb crec cree crex cxxx e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl eaxl ebac ebal ebba ebbc ebbr ebcc ebel eber ebla ecaa ecac ecal ecar ecbc ecbe ecca eccb eccc ecce eccl ecla ecra ecrc ecrl ecrr eeca eeea eeee eele eera eerc el-b elab elac elal elar elba elbe elca elcb elce elea elec elee eler elex ella elle elra er-x eral erba erbb erbe erca ercc erce ereb erec erel erer erla erle erll erra errc erre exa- excl exec exel exer exrx laaa laac laal laar laax laba labe labr laca lacc lace lacl lael laer lala lale lall lara larb larc lare larr laxa laxe lbar lbcc lblr lcac lcbc lcca lccc lcce lcer lcra lcrl leaa leal lear leba leca lece leea leel leer lela lele lell lera lerc lere lexa lexx llcc lllc llll lrac lral lrba lrrc lrrr lxra lxxx raab raba rabb rabe rabl rac- raca racc race raec rael raer rala ralb rale rall rara rarb rare raxa rbbb rbbr rbcl rble rcac rcbc rccb rccc rcle rea- reac reae real rear reba rebb rebe reca recc rece recr reeb reel rela relb rele rell rera rere rexx rlab rlee rrle rrrr xaar xace xacl xala xall xara xare xbar xbee xbel xbra xbrl xcal xcbl xcel xeer xela xer- xera xexe xxxx