-al -er -ol a-a a-b a-t aaa aab aae aaf aak aal aao aar aat ab- aba abb abe abf abk abl abo abr abt aea aeb aee aef aek ael aeo aer aet af- afa afb afe aff afk afl afo afr aft aka akb ake akk akl ako akr al- ala alb ale alf alk all alo alr alt aoa aob aoe aof aok aol aoo aor aot ar- ara arb are arf ark arl aro arr art at- ata atb ate atf atl ato atr att baa bab bae baf bak bal bao bar bat bba bbb bbe bbf bbk bbl bbo bbr bbt be- bea beb bee bef bek bel beo ber bet bfa bfb bfe bff bfl bfo bfr bft bka bkb bke bkf bkk bkl bko bkr bkt bla blb ble blf blk bll blo blr blt boa bob boe bof bok bol boo bor bot bra brb bre brf brk brl bro brr brt bta btb bte btf btk btl bto btr btt eaa eab eae eaf eak eal eao ear eat eba ebb ebe ebf ebk ebl ebo ebr ebt eea eeb eee eef eek eel eeo eer eet ef- efa efb efe eff efl efo efr eft eka ekb eke ekf ekl eko ekr ekt ela elb ele elf elk ell elo elr elt eo- eoa eob eoe eof eok eol eoo eor eot era erb ere erf erk erl ero err ert eta etb ete etf etk etl eto etr ett faa fab fae faf fak fal fao far fat fba fbb fbe fbf fbk fbl fbo fbr fbt fea feb fee fef fek fel feo fer fet ffa ffe fff ffk ffl ffo ffr fft fka fkb fkf fkk fkl fkt fla flb fle flf fll flo flr flt foa fob foe fof fok fol foo for fot fra frb fre frf frk frl fro frr frt fta ftb fte ftf ftk ftl fto ftr ftt k-t ka- kaa kab kae kaf kak kal kao kar kat kba kbb kbe kbf kbk kbl kbo kbr ke- kea keb kee kef kek kel keo ker ket kfa kff kfo kkb kke kkk kkl kkr kkt kl- kla klb klf klo klr klt koa kob koe kof kok kol koo kor kot kra krf krk krl kro krr krt kta ktb kte ktf ktk ktl kto ktr ktt la- laa lab lae laf lak lal lao lar lat lba lbb lbe lbf lbk lbl lbo lbr lbt lea leb lee lef lek lel leo ler let lfa lfb lfe lff lfk lfl lfo lfr lft lka lkb lkl lkr lkt lla llb lle llf llk lll llo llr llt loa lob loe lof lok lol loo lor lot lra lrb lrf lrk lro lrr lrt lta ltb lte ltf ltk ltl lto ltr ltt oaa oab oae oaf oak oal oao oar oat ob- oba obb obe obf obk obl obo obr obt oea oeb oee oef oel oeo oer oet of- ofa ofb ofe off ofl ofo ofr oft oka okb oke okk okl oko okr ola olb ole olf olk oll olo olt oo- ooa oob oof ook ool ooo oor oot or- ora orb ore orf ork orl oro orr ort ot- ota otb ote otf otk otl oto otr ott ra- raa rab rae raf rak ral rao rar rat rba rbb rbe rbf rbk rbl rbo rbr rbt re- rea reb ree ref rek rel reo rer ret rfa rfb rfe rff rfk rfl rfo rfr rft rkb rke rkf rkk rko rkt rla rle rlf rll rlo rlr rlt roa rob roe rof rok rol roo ror rot rra rrb rrf rrk rrl rrr rrt rta rtb rte rtf rtk rtl rto rtr rtt taa tab tae taf tak tal tao tar tat tba tbb tbe tbf tbk tbl tbo tbr tbt te- tea teb tee tef tek tel teo ter tet tfa tfb tfe tff tfk tfl tfo tfr tft tka tkb tke tkk tkl tko tkr tkt tla tle tlf tlk tll tlo tlr tlt to- toa tob toe tof tok tol too tor tot tra trb tre trf trk trl tro trr trt tta ttb tte ttf ttk ttl tto ttr ttt