-er a-a a-b a-c aaa aab aac aad aae aao aar aax ab- aba abb abc abd abe abo abr abx ac- aca acb acc acd ace aco acr acx ad- ada adb adc add ade ado adr adx aea aeb aec aed aee aeo aer aex aoa aob aoc aod aoe aoo aor aox ar- ara arb arc ard are aro arr arx ax- axa axe axo axr axx baa bab bac bad bae bao bar bax bba bbb bbc bbd bbe bbo bbr bbx bca bcb bcc bcd bce bco bcr bcx bda bdb bdc bdd bde bdo bdr bdx be- bea beb bec bed bee beo ber bex boa bob boc bod boe boo bor box bra brb brd bre bro brr brx bxb bxd bxo bxx c-- caa cab cac cad cae cao car cax cba cbb cbc cbd cbe cbo cbr cbx cca ccb ccc ccd cce cco ccr ccx cda cdb cdc cdd cde cdo cdr cdx ce- cea ceb cec ced cee ceo cer cex co- coa cob coc cod coe coo cor cox cra crb crc crd cre cro crr crx cxc cxo cxr cxx daa dab dac dad dae dao dar dax dba dbb dbc dbd dbe dbo dbr dbx dca dcb dcc dcd dce dco dcr dcx dda ddb ddc ddd dde ddo ddr ddx de- dea deb dec ded dee deo der dex doa dob doc dod doe doo dor dox dra drb drc drd dre dro drr drx dxc dxd dxo dxr dxx eaa eab eac ead eae eao ear eax eba ebb ebc ebd ebe ebo ebr ebx ec- eca ecb ecc ecd ece eco ecr ecx ed- eda edb edc edd ede edo edr edx eea eeb eec eed eee eeo eer eex eo- eoa eob eoc eod eoe eoo eor era erb erc erd ere ero err ex- exa exc exd exe exo exr exx oaa oab oac oad oae oao oar oax ob- oba obb obc obd obe obo obr obx oc- oca ocb occ ocd oco ocr ocx oda odb odc odd ode odo odr oea oeb oec oed oee oeo oer oex oo- ooa oob ooc ood ooo oor oox or- ora orb orc ord ore oro orr orx ox- oxa oxb oxc oxo oxx ra- raa rab rac rad rae rao rar rax rba rbb rbc rbd rbe rbo rbr rbx rca rcb rcc rcd rce rco rcr rcx rda rdb rdc rdd rde rdo rdr rdx re- rea reb rec red ree reo rer rex roa rob roc rod roe roo ror rox rra rrb rrc rrd rrr rxr xaa xac xad xar xbc xbe xbr xbx xcb xcd xcr xcx xda xdb xdc xde xdr xed xee xer xex xoa xoc xod xoo xor xox xrc xrd xrx xxo xxx

a-be a-do aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aaca aacb aacc aacd aace aaco aacr aada aadc aade aaea aaec aaoe aaoo aara aarc aard aare aaro abaa abab abac abad abae abar abax abb- abba abbb abbe abbo abbr abca abcb abcc abcd abcr abda abdo abec abed abee aber aboa abob abod aboo abor abox abra abrc abro acaa acab acac acad acae acar acba acca accc accd acce acco acda acdb acdc acde ace- acea acec aced acer acoa acod acoe acor acr- acra acrc acre acro acrr adaa adab adac adad adae adao adar adba adbc adcc adda addc addd adde addo addr adea adeb adee adeo ader adob adoc adod adoe adoo ador adox adra adre adro aeac aecb aede aeer aer- aera aerc aerd aero aoba aoca aoce aora aorb arab arac arad arae arar arax arba arbe arc- arca arce arco arda ardc arde ardo area arec ared aree areo arex aroa arob arod aroe aroo aror arr- arra arrc arre arro arrr axar axce axed axer axo- axoa axxo ba-x baaa baad baar baba babb babe babo babr bac- baca bacc bace baco bada badb badd bade bado badr baed baer bar- bara barb barc bard bare baro barr barx bbad bbbb bbdd bbdo bbeb bbox bbrc bcaa bcar bcbc bcca bccc bcda bcde bcec bcer bcor bcra bd-r bdbc bddc bead bear beba bebb bebe bebo beca beda bede bedo beeb beed beer beo- beod beor bera berc berd bere bero berr boab boac boad boar boba bobb bobe bobo boca boce boco boda bodb bode bodo boea boec boee boeo boer boob booc bood booe boor boox bor- bora bord bore boro borr boxa brab brac brad brae brao brax brca brcb brce brda brdo brea breb brec bred bree breo brer brex broa brob broc brod broe broo bror brox brrr c-bo c-cd caaa caab caac caba cabe cabo cac- caca cacc cace caco cacr cada cadc cadd cade cado cadr caec caer caex caod caor cara carb carc card care caro carr carx caxa cbac cbar cbax cbbc cbca cbcc cbce cbcr cbdb cbdc cbdo cbea cbec cbee cber cbox cbrd cbre cbxa ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc ccdc ccdr cced ccee ccob ccoc ccod ccra ccrc ccre cd-e cd-r cdaa cdac cdad cdax cdba cdda cddb cddr cdec cder cdex cdre ceac cead cear ceba cec- ceca cece ceco ceda cedd cede cedo ceeb ceec ceor cer- cera cerc cerd cere cero cexe coad coax coba cobb cobe cobo coca coce coco coda codd code coed coex coob cood cor- cora corb corc cord core coro corr coxa coxe crab crac crar crax crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree creo crex crob croc crod croe croo cror cxro cxxx d-bo daab daad daae daar daba dabb dabo daca dace dada dade dado daeb daer dara darb darc dard dare daro darr dbar dbcc dcbc dcca dccb dccc dcdb dcra dcxx dddd ddoc ddrc ddre deac dead deae dear deba debe dec- deca decc decd dece deco deda dedd dede dedo