-al -er -ol a-a a-b a-c aaa aab aac aae aal aao aar ab- aba abb abc abe abl abo abr ac- aca acb acc ace acl aco acr aea aeb aec aee ael aeo aer al- ala alb alc ale all alo alr aoa aob aoc aoe aol aoo aor ar- ara arb arc are arl aro arr baa bab bac bae bal bao bar bba bbb bbc bbe bbl bbo bbr bca bcb bcc bce bcl bco bcr be- bea beb bec bee bel beo ber bla blb blc ble bll blo blr boa bob boc boe bol boo bor bra brb bre brl bro brr c-- caa cab cac cae cal cao car cba cbb cbc cbe cbl cbo cbr cca ccb ccc cce ccl cco ccr ce- cea ceb cec cee cel ceo cer cl- cla clb clc cle cll clo clr co- coa cob coc coe col coo cor cra crb crc cre crl cro crr eaa eab eac eae eal eao ear eba ebb ebc ebe ebl ebo ebr ec- eca ecb ecc ece ecl eco ecr eea eeb eec eee eel eeo eer ela elb elc ele ell elo elr eo- eoa eob eoc eoe eol eoo eor era erb erc ere erl ero err la- laa lab lac lae lal lao lar lba lbb lbc lbe lbl lbo lbr lca lcb lcc lce lcl lco lcr lea leb lec lee lel leo ler lla llb llc lle lll llo llr loa lob loc loe lol loo lor lra lrb lrc lro lrr oaa oab oac oae oal oao oar ob- oba obb obc obe obl obo obr oc- oca ocb occ ocl oco ocr oea oeb oec oee oel oeo oer ola olb olc ole oll olo oo- ooa oob ooc ool ooo oor or- ora orb orc ore orl oro orr ra- raa rab rac rae ral rao rar rba rbb rbc rbe rbl rbo rbr rca rcb rcc rce rcl rco rcr re- rea reb rec ree rel reo rer rla rlc rle rll rlo rlr roa rob roc roe rol roo ror rra rrb rrc rrl rrr

a-be aaaa aaab aaac aaae aaal aaar aaba aabb aabc aabl aaca aacb aacc aace aacl aaco aacr aaea aaec aala aalc aale aall aalo aaoe aaoo aara aarc aare aaro abaa abab abac abae abal abar abb- abba abbb abbe abbo abbr abca abcb abcc abcl abcr abec abee abel aber abla able ablo aboa abob abol aboo abor abra abrc abro acaa acab acac acae acar acba acbl acca accc acce acco ace- acea acec acel acer acla aclc acle aclr acoa acoe acol acor acr- acra acrc acre acro acrr aeac aecb aecl aeer aela aelc aer- aera aerc aero alaa alac alae alal alao alar alb- alba albc albe albo alca alcc alce alco alea alec alee aleo aler all- alla alle alll allo allr aloa aloc aloe alol aloo alor alro aoba aoca aoce aola aole aora aorb arab arac arae aral arar arba arbe arc- arca arce arco area arec aree arel areo arla arle arlo aroa arob aroe aroo aror arr- arra arrc arre arro arrr baaa baal baar baba babb babe babo babr bac- baca bacc bace baco bael baer bala balc bale ball balo baol bar- bara barb barc bare baro barr bbbb bbeb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcec bcer bcor bcra beal bear beba bebb bebe bebo beca beeb beel beer bela bele bell belo beo- beor bera berc bere bero berr blaa blab blac blae blea bleb blee bleo blob bloc bloo blrc boab boac boal boar boba bobb bobe bobo boca boce boco boea boec boee boel boeo boer bola bole boll bolo boob booc booe bool boor bor- bora bore boro borr brab brac brae brao brca brcb brce brea breb brec bree brel breo brer broa brob broc broe brol broo bror brrr c-bo caaa caab caac caal caba cabe cabo cac- caca cacc cace caco cacr caec caer cala calc cale call calo caol caor cara carb carc care carl caro carr cbac cbal cbar cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cber cblb cblc cbol cbre cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc ccob ccoc ccra ccrc ccre ccrl ceac ceal cear ceba cec- ceca cece ceco ceeb ceec ceel cel- cela celc cele cell celo ceol ceor cer- cera cerc cere cerl cero clab clar clea clec clee cleo cler clob cloe cloo clor clra clro coal coba cobb cobe cobo coca coce coco coel col- cola colb cole coll colo coob cool cor- cora corb corc core corl coro corr crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creo crob croc croe crol croo cror e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl earo ebac ebal ebba ebbc ebbo ebbr ebcc ebel eber ebla eboe ebol eboo ebor ebro ecaa ecac ecal ecao ecar ecbc ecbe ecca eccb eccc ecce eccl ecco ecla eco- ecol ecra ecrc ecrl ecrr eeca eeea eeee eele eeoc eera eerc eero el-b elab elac elal elar elba elbe elbo elca elcb elce elco elea elec elee eleo eler ella elle ello elra elro eola eole eolo eora eore eorl eral erba erbb erbe erca ercc erce ereb erec erel erer erla erle erll erob eroc eroe erol eroo erra errc erre erro laaa laac laal laar laba labe labo labr laca lacc lace lacl laco lael laer lala lale lall lalo lara larb larc lare larr lbar lbcc lblr lcac lcbc lcca lccc lcce lcer lcor lcra lcrl leaa leal leao lear leba lebo leca lece leco leea leel leer lela lele lell lelo leoc leor lera lerc lere lero llao llcc lllc llll lloa lloc lloo loac loar lob- loba lobb lobe lobo loca locc loce loco loeb lola lole loll lolo loob