-al -er a-a a-b a-c a-t aaa aab aac aae aal aar aat aax ab- aba abb abc abe abl abr abt abx ac- aca acb acc ace acl acr act acx aea aeb aec aee ael aer aet aex al- ala alb alc ale all alr alt alx ar- ara arb arc are arl arr art arx at- ata atb atc ate atl atr att atx ax- axa axe axl axr axt axx baa bab bac bae bal bar bat bax bba bbb bbc bbe bbl bbr bbt bbx bca bcb bcc bce bcl bcr bct bcx be- bea beb bec bee bel ber bet bex bla blb blc ble bll blr blt blx bra brb bre brl brr brt brx bta btb btc bte btl btr btt btx bxb bxl bxx c-- caa cab cac cae cal car cat cax cba cbb cbc cbe cbl cbr cbt cbx cca ccb ccc cce ccl ccr cct ccx ce- cea ceb cec cee cel cer cet cex cl- cla clb clc cle cll clr clt clx cra crb crc cre crl crr crt crx cta ctb ctc cte ctl ctr ctt ctx cxc cxl cxr cxt cxx eaa eab eac eae eal ear eat eax eba ebb ebc ebe ebl ebr ebt ebx ec- eca ecb ecc ece ecl ecr ect ecx eea eeb eec eee eel eer eet eex ela elb elc ele ell elr elt elx era erb erc ere erl err ert eta etb etc ete etl etr ett etx ex- exa exc exe exl exr ext exx la- laa lab lac lae lal lar lat lax lba lbb lbc lbe lbl lbr lbt lbx lca lcb lcc lce lcl lcr lct lcx lea leb lec lee lel ler let lex lla llb llc lle lll llr llt lra lrb lrc lrr lrt lta ltb ltc lte ltl ltr ltt ltx lxc lxr lxx ra- raa rab rac rae ral rar rat rax rba rbb rbc rbe rbl rbr rbt rbx rca rcb rcc rce rcl rcr rct rcx re- rea reb rec ree rel rer ret rex rla rlc rle rll rlr rlt rra rrb rrc rrl rrr rrt rta rtb rtc rte rtl rtr rtt rtx rxr t-x taa tab tac tae tal tar tat tax tba tbb tbc tbe tbl tbr tbt tca tcb tcc tce tcl tcr tct tcx te- tea teb tec tee tel ter tet tex tla tlc tle tll tlr tlt tlx tra trb trc tre trl trr trt trx tta ttb ttc tte ttl ttr ttt ttx txe txl txt xaa xac xal xar xat xbc xbe xbl xbr xbx xcb xcl xcr xcx xee xel xer xet xex xla xlb xlr xlt xrc xrt xrx xtc xtr xtx xxl xxx

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 abax 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 aetx alaa alac alae alal alar alat alb- alba albc albe alca alcc alce alea alec alee aler alet alex all- alla alle alll allr alta alte altx alxa arab arac arae aral arar arat arax arba arbe arc- arca arce arct area arec aree arel aret arex arla arle arr- arra arrc arre arrr arrt arta artc arte artr artx at-l at-t at-x ataa atab atac atae atal atar atat atax atca atcc atcl atcr atea atec atee atel ater atex atla atle atra atrc atre atrx atta atte attr axal axar axat axce axel axer axle ba-x 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 barx bata batc bate batt baxt 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 brax brca brcb brce brea breb brec bree brel brer bret brex brrr brtc btaa btcc btcl btcx btec btex btla btrc btrt bttb caaa caab caac caal caat caba cabe cac- caca cacc cace cacr caec caer caex cala calc cale call calt calx cara carb carc care carl carr cart carx cat- cata catb catc cate catt caxa cbac cbal cbar cbat cbax cbbc cbca cbcc cbce cbcl cbcr cbct cbea cbec cbee cber cbet cblb cblc cbre cbrl cbrt cbta cbtc cbtl cbxa ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc cclx ccra ccrc ccre ccrl ccrt cctb cctc cctl cctt ccxl 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 cexe clab clar clat clea clec clee cler clet clra cltb cltc clxx crab crac crar crat crax crbc crca crcc crce crcr cre- crea creb crec cree cret crex crrt crtc crtl ctab ctae ctal ctba ctca ctec ctle ctrc ctrl ctta cxxx e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl eart eata eate eaxl 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 eext