-er a-a a-b a-c a-t aaa aab aac aae aao aar aat aax ab- aba abb abc abe abo abr abt abx ac- aca acb acc ace aco acr act acx aea aeb aec aee aeo aer aet aex aoa aob aoc aoe aoo aor aot aox ar- ara arb arc are aro arr art arx at- ata atb atc ate ato atr att atx ax- axa axe axo axr axt axx baa bab bac bae bao bar bat bax bba bbb bbc bbe bbo bbr bbt bbx bca bcb bcc bce bco bcr bct bcx be- bea beb bec bee beo ber bet bex boa bob boc boe boo bor bot box bra brb bre bro brr brt brx bta btb btc bte bto btr btt btx bxb bxo bxx c-- caa cab cac cae cao car cat cax cba cbb cbc cbe cbo cbr cbt cbx cca ccb ccc cce cco ccr cct ccx ce- cea ceb cec cee ceo cer cet cex co- coa cob coc coe coo cor cot cox cra crb crc cre cro crr crt crx cta ctb ctc cte cto ctr ctt ctx cxc cxo cxr cxt cxx eaa eab eac eae eao ear eat eax eba ebb ebc ebe ebo ebr ebt ebx ec- eca ecb ecc ece eco ecr ect ecx eea eeb eec eee eeo eer eet eex eo- eoa eob eoc eoe eoo eor eot era erb erc ere ero err ert eta etb etc ete eto etr ett etx ex- exa exc exe exo exr ext exx oaa oab oac oae oao oar oat oax ob- oba obb obc obe obo obr obt obx oc- oca ocb occ oco ocr oct ocx oea oeb oec oee oeo oer oet oex oo- ooa oob ooc ooo oor oot oox or- ora orb orc ore oro orr ort orx ot- ota otb otc ote oto otr ott ox- oxa oxb oxc oxo oxt oxx ra- raa rab rac rae rao rar rat rax rba rbb rbc rbe rbo rbr rbt rbx rca rcb rcc rce rco rcr rct rcx re- rea reb rec ree reo rer ret rex roa rob roc roe roo ror rot rox rra rrb rrc rrr rrt rta rtb rtc rte rto rtr rtt rtx rxr t-x taa tab tac tae tao tar tat tax tba tbb tbc tbe tbo tbr tbt tca tcb tcc tce tco tcr tct tcx te- tea teb tec tee teo ter tet tex to- toa tob toc toe too tor tot tox tra trb trc tre tro trr trt trx tta ttb ttc tte tto ttr ttt ttx txe txt xaa xac xar xat xbc xbe xbr xbx xcb xcr xcx xee xer xet xex xoa xoc xoo xor xot xox xrc xrt xrx xtc xtr xtx xxo xxx

a-be aaaa aaab aaac aaae aaar aaba aabb aabc aabt aaca aacb aacc aace aaco aacr aact aaea aaec aaoe aaoo aara aarc aare aaro aart aata aatc aatt abaa abab abac abae abar abat abax abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcr abct abec abee aber abet aboa abob aboo abor abot abox abra abrc abro abta ac-t acaa acab acac acae acar acat acba acca accc acce acco acct ace- acea acec acer acet acoa acoe acor acot acr- acra acrc acre acro acrr acta actc acte acto actt aeac aecb aect aeer aer- aera aerc aero aeta aetc aeto aetr aett aetx aoba aoca aoce aora aorb aort aotc arab arac arae arar arat arax arba arbe arc- arca arce arco arct area arec aree areo aret arex aroa arob aroe aroo aror arr- arra arrc arre arro arrr arrt arta artc arte arto artr artx at-t at-x ataa atab atac atae atar atat atax atca atcc atco atcr atea atec atee ateo ater atex atob atoc atoe ator atot atra atrc atre atro atrx atta atte atto attr axar axat axce axer axo- axoa axto axxo ba-x baaa baar baat baba babb babe babo babr bac- baca bacc bace baco bact baer bar- bara barb barc bare baro barr bart barx bata batc bate bato batt baxt bbbb bbeb bbet bbox bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcor bcra bctc bear beat beba bebb bebe bebo beca beeb beer beet beo- beor beot bera berc bere bero berr bert beta betc bete beto bett boab boac boar boat boba bobb bobe bobo boca boce boco boea boec boee boeo boer boet boob booc booe boor boot boox bor- bora bore boro borr bort bota botb bote boto bott boxa brab brac brae brao brat brax brca brcb brce brea breb brec bree breo brer bret brex broa brob broc broe broo bror brot brox brrr brtc btaa btcc btcx btec btex btob btor btrc btrt bttb c-bo caaa caab caac caat caba cabe cabo cac- caca cacc cace caco cacr caec caer caex caor cara carb carc care caro carr cart carx cat- cata catb catc cate cato catt caxa cbac cbar cbat cbax cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbot cbox cbre cbrt cbta cbtc cbxa ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccee ccob ccoc ccra ccrc ccre ccrt cctb cctc cctt ceac cear ceat ceba cec- ceca cece ceco cect ceeb ceec ceor cer- cera cerc cere cero cert cet- ceta cete ceto cexe coat coax coba cobb cobe cobo coca coce coco coct coex coob coot cor- cora corb corc core coro corr cort cota cotb cotc cote coto cott coxa coxe crab crac crar crat crax crbc crca crcc crce crcr cre- crea creb crec cree creo cret crex crob croc croe croo cror crot crrt crtc ctab ctae ctba ctca ctec ctor ctot ctrc ctta cxro cxxx eaba eaca eacc eaec eara earb eare earo eart eata eate ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebox ebro ecaa ecac ecao ecar ecat