-al -er -ol a-a a-b aaa aab aad aae aaf aak aal aao aar ab- aba abb abd abe abf abk abl abo abr ad- ada adb add ade adf adk adl ado adr aea aeb aed aee aef aek ael aeo aer af- afa afb afd afe aff afk afl afo afr aka akb akd ake akk akl ako akr al- ala alb ald ale alf alk all alo alr aoa aob aod aoe aof aok aol aoo aor ar- ara arb ard are arf ark arl aro arr baa bab bad bae baf bak bal bao bar bba bbb bbd bbe bbf bbk bbl bbo bbr bda bdb bdd bde bdf bdk bdl bdo bdr be- bea beb bed bee bef bek bel beo ber bfa bfb bfd bfe bff bfl bfo bfr bka bkb bke bkf bkk bkl bko bkr bla blb bld ble blf blk bll blo blr boa bob bod boe bof bok bol boo bor bra brb brd bre brf brk brl bro brr daa dab dad dae daf dak dal dao dar dba dbb dbd dbe dbf dbk dbl dbo dbr dda ddb ddd dde ddf ddk ddl ddo ddr de- dea deb ded dee def dek del deo der dfa dfb dfd dfe dff dfk dfl dfo dfr dka dkb dke dkk dkl dko dkr dl- dla dlb dld dle dlf dlk dll dlo dlr doa dob dod doe dof dok dol doo dor dra drb drd dre drk drl dro drr eaa eab ead eae eaf eak eal eao ear eba ebb ebd ebe ebf ebk ebl ebo ebr ed- eda edb edd ede edf edk edl edo edr eea eeb eed eee eef eek eel eeo eer ef- efa efb efd efe eff efl efo efr eka ekb ekd eke ekf ekl eko ekr ela elb eld ele elf elk ell elo elr eo- eoa eob eod eoe eof eok eol eoo eor era erb erd ere erf erk erl ero err faa fab fad fae faf fak fal fao far fba fbb fbd fbe fbf fbk fbl fbo fbr fda fdb fdd fde fdf fdk fdl fdo fdr fea feb fed fee fef fek fel feo fer ffa ffd ffe fff ffk ffl ffo ffr fka fkb fkf fkk fkl fla flb fld fle flf fll flo flr foa fob foe fof fok fol foo for fra frb frd fre frf frk frl fro frr ka- kaa kab kad kae kaf kak kal kao kar kba kbb kbd kbe kbf kbk kbl kbo kbr kda kdb kde kdf kdk kdl kdo kdr ke- kea keb ked kee kef kek kel keo ker kfa kfd kff kfo kkb kke kkk kkl kkr kl- kla klb kld klf klo klr koa kob kod koe kof kok kol koo kor kra krd krf krk krl kro krr la- laa lab lad lae laf lak lal lao lar lba lbb lbd lbe lbf lbk lbl lbo lbr lda ldb ldd lde ldf ldk ldl ldo ldr lea leb led lee lef lek lel leo ler lfa lfb lfd lfe lff lfk lfl lfo lfr lka lkb lkl lkr lla llb lld lle llf llk lll llo llr loa lob lod loe lof lok lol loo lor lra lrb lrd lrf lrk lro lrr oaa oab oad oae oaf oak oal oao oar ob- oba obb obd obe obf obk obl obo obr oda odb odd ode odf odl odo odr oea oeb oed oee oef oel oeo oer of- ofa ofb ofd ofe off ofl ofo ofr oka okb okd oke okk okl oko okr ola olb old ole olf olk oll olo oo- ooa oob ood oof ook ool ooo oor or- ora orb ord ore orf ork orl oro orr ra- raa rab rad rae raf rak ral rao rar rba rbb rbd rbe rbf rbk rbl rbo rbr rda rdb rdd rde rdf rdl rdo rdr re- rea reb red ree ref rek rel reo rer rfa rfb rfd rfe rff rfk rfl rfo rfr rkb rke rkf rkk rko rla rld rle rlf rll rlo rlr roa rob rod roe rof rok rol roo ror rra rrb rrd rrf rrk rrl rrr

a-ak a-be a-do a-ok aaaa aaab aaad aaae aaaf aaal aaar aaba aabb aabd aabl aada aade aaea aafa aafb aafd aaff aafl aaka aake aala aald aale aall aalo aaoe aaoo aara aard aare aaro abaa abab abad abae abaf abak abal abar abb- abba abbb abbe abbo abbr abda abdo abed abee abel aber abff abla able ablo aboa abob abod abof abok abol aboo abor abra abro adaa adab adad adae adak adal adao adar adba adda addd adde addl addo addr adea adeb adee adel adeo ader adfa adfl adle adob adod adoe adok adoo ador adra adre adro aeaf aede aeer aeka aela aer- aera aerd aero afaa afad afak afao afar afdb afdl afee afek afel afer affa affo afka afkr afla afle afoa afoe afol afoo afor afr- afra afre afro akaa akae akal akao akar aked akee akel aker akka akko akle aklo akok akr- akra akre alaa alad alae alak alal alao alar alb- alba albe albo ald- alda alde aldl aldo alea aled alee alef alek aleo aler alfa alfe alk- alka alkb alkd alke alko all- alla alle alll allo allr aloa alod aloe alof alok alol aloo alor alro aoba aola aole aora aorb arab arad arae araf arak aral arar arba arbe arda arde ardf ardl ardo area ared aree aref arek arel areo arfa arfb arff arka arke arko arla arle arlo aroa arob arod aroe aroo aror arr- arra arre arrk arro arrr baaa baad baaf baak baal baar baba babb babe babo babr bada badb badd bade bado badr baed baek bael baer baff bafo bak- baka bake bakl bako bakr bala bald bale balf balk ball balo baol bar- bara barb bard bare barf bark baro barr bbad bbbb bbdd