-al -er -ol a-a a-b a-c aaa aab aac aae aal aao aar aax ab- aba abb abc abe abl abo abr abx ac- aca acb acc ace acl aco acr acx aea aeb aec aee ael aeo aer aex al- ala alb alc ale all alo alr alx aoa aob aoc aoe aol aoo aor aox ar- ara arb arc are arl aro arr arx ax- axa axe axl axo axr axx baa bab bac bae bal bao bar bax bba bbb bbc bbe bbl bbo bbr bbx bca bcb bcc bce bcl bco bcr bcx be- bea beb bec bee bel beo ber bex bla blb blc ble bll blo blr blx boa bob boc boe bol boo bor box bra brb bre brl bro brr brx bxb bxl bxo bxx c-- caa cab cac cae cal cao car cax cba cbb cbc cbe cbl cbo cbr cbx cca ccb ccc cce ccl cco ccr ccx ce- cea ceb cec cee cel ceo cer cex cl- cla clb clc cle cll clo clr clx co- coa cob coc coe col coo cor cox cra crb crc cre crl cro crr crx cxc cxl cxo cxr cxx eaa eab eac eae eal eao ear eax eba ebb ebc ebe ebl ebo ebr ebx ec- eca ecb ecc ece ecl eco ecr ecx eea eeb eec eee eel eeo eer eex ela elb elc ele ell elo elr elx eo- eoa eob eoc eoe eol eoo eor era erb erc ere erl ero err ex- exa exc exe exl exo exr exx la- laa lab lac lae lal lao lar lax lba lbb lbc lbe lbl lbo lbr lbx lca lcb lcc lce lcl lco lcr lcx lea leb lec lee lel leo ler lex lla llb llc lle lll llo llr loa lob loc loe lol loo lor lox lra lrb lrc lro lrr lxc lxo lxr lxx oaa oab oac oae oal oao oar oax ob- oba obb obc obe obl obo obr obx oc- oca ocb occ ocl oco ocr ocx oea oeb oec oee oel oeo oer oex ola olb olc ole oll olo oo- ooa oob ooc ool ooo oor oox or- ora orb orc ore orl oro orr orx ox- oxa oxb oxc oxo oxx ra- raa rab rac rae ral rao rar rax rba rbb rbc rbe rbl rbo rbr rbx rca rcb rcc rce rcl rco rcr rcx re- rea reb rec ree rel reo rer rex rla rlc rle rll rlo rlr roa rob roc roe rol roo ror rox rra rrb rrc rrl rrr rxr xaa xac xal xar xbc xbe xbl xbr xbx xcb xcl xcr xcx xee xel xer xex xla xlb xlr xoa xoc xoo xor xox xrc xrx xxl xxo xxx

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 abax abb- abba abbb abbe abbo abbr abca abcb abcc abcl abcr abec abee abel aber abla able ablo aboa abob abol aboo abor abox 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 alex all- alla alle alll allo allr aloa aloc aloe alol aloo alor alro alxa aoba aoca aoce aola aole aora aorb arab arac arae aral arar arax arba arbe arc- arca arce arco area arec aree arel areo arex arla arle arlo aroa arob aroe aroo aror arr- arra arrc arre arro arrr axal axar axce axel axer axle axo- axoa axxo ba-x 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 barx bbbb bbeb bblb bbox 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 boox bor- bora bore boro borr boxa brab brac brae brao brax brca brcb brce brea breb brec bree brel breo brer brex broa brob broc broe brol broo bror brox brrr c-bo caaa caab caac caal caba cabe cabo cac- caca cacc cace caco cacr caec caer caex cala calc cale call calo calx caol caor cara carb carc care carl caro carr carx caxa cbac cbal cbar cbax cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cber cblb cblc cbol cbox cbre cbrl cbxa ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc cclx ccob ccoc ccra ccrc ccre ccrl ccxl 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 cexe clab clar clea clec clee cleo cler clob cloe cloo clor clox clra clro clxx coal coax coba cobb cobe cobo coca coce coco coel coex col- cola colb cole coll colo coob cool cor- cora corb corc core corl coro corr coxa coxe crab crac crar crax crbc crca crcc crce crcr cre- crea creb crec cree creo crex crob croc croe crol croo cror cxro cxxx e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl earo eaxl ebac ebal ebba ebbc ebbo ebbr ebcc ebel eber ebla eboe ebol eboo ebor ebox ebro ecaa ecac ecal ecao ecar ecbc ecbe ecca eccb