-al -er -ol a-a a-b a-i a-t aaa aab aae aag aai aak aal aao aar aat ab- aba abb abe abg abi abk abl abo abr abt aea aeb aee aeg aei aek ael aeo aer aet ag- aga agb age agg agi agk agl ago agr agt ai- aia aib aie aig aii aik ail aio air ait aka akb ake akg aki akk akl ako akr al- ala alb ale alg ali alk all alo alr alt aoa aob aoe aog aoi aok aol aoo aor aot ar- ara arb are arg ari ark arl aro arr art at- ata atb ate atg ati atl ato atr att baa bab bae bag bai bak bal bao bar bat bba bbb bbe bbg bbi bbk bbl bbo bbr bbt be- bea beb bee beg bei bek bel beo ber bet bga bgb bge bgg bgi bgk bgl bgo bgr bgt bi- bia bib bie big bii bik bil bio bir bit bka bkb bke bkg bkk bkl bko bkr bkt bla blb ble blg bli blk bll blo blr blt boa bob boe bog boi bok bol boo bor bot bra brb bre brg bri brk brl bro brr brt bta btb bte btg bti btk btl bto btr btt eaa eab eae eag eai eak eal eao ear eat eba ebb ebe ebg ebi ebk ebl ebo ebr ebt eea eeb eee eeg eek eel eeo eer eet ega egb ege egg egi egl ego egr egt eia eib eie eig eii eik eil eio eir eit eka ekb eke ekg eki ekl eko ekr ekt ela elb ele elg eli elk ell elo elr elt eo- eoa eob eoe eog eoi eok eol eoo eor eot era erb ere erg eri erk erl ero err ert eta etb ete etg eti etk etl eto etr ett gaa gab gae gag gai gak gal gao gar gat gba gbe gbg gbi gbk gbl gbo gbr gbt ge- gea geb gee geg gei gek gel geo ger get gga ggb ggg ggi ggo ggr ggt gia gib gie gig gii gik gil gio gir git gka gkb gko gkt gla glb gle glg gli glk gll glo glr glt goa gob goe gog goi gok gol goo gor got gra grb gre grg gri grk grl gro grr grt gta gtb gte gtg gti gtk gtl gto gtr gtt ia- iaa iab iae iag iai ial iao iar iat iba ibb ibe ibg ibi ibk ibl ibo ibr ibt ie- iea iee ieg iei iek iel ier iet iga igb ige igg igi igk igl igo igr igt iia iib iie iii iil iio iir iit ika ikb ike iki ikk ikl iko ikr ikt il- ila ilb ile ilg ili ilk ill ilo ilr ilt io- ioa iob ioe iog ioi iol ioo ior iot ir- ira irb ire irg iri irk irl iro irr irt ita itb ite itg iti itk itl ito itt k-t ka- kaa kab kae kag kai kak kal kao kar kat kba kbb kbe kbi kbk kbl kbo kbr ke- kea keb kee keg kei kek kel keo ker ket kga kgb kgi kgl kgo kia kib kie kig kii kik kil kio kir kit kkb kke kki kkk kkl kkr kkt kl- kla klb klg kli klo klr klt koa kob koe kog koi kok kol koo kor kot kra krg kri krk krl kro krr krt kta ktb kte ktg ktk ktl kto ktr ktt la- laa lab lae lag lai lak lal lao lar lat lba lbb lbe lbg lbi lbk lbl lbo lbr lbt lea leb lee leg lei lek lel leo ler let lga lgb lge lgg lgi lgk lgl lgo lgr lgt lia lib lie lig lii lik lil lio lir lit lka lkb lkg lkl lkr lkt lla llb lle llg lli llk lll llo llr llt loa lob loe log loi lok lol loo lor lot lra lrb lrg lri lrk lro lrr lrt lta ltb lte ltg lti ltk ltl lto ltr ltt o-i oaa oab oae oag oai oak oal oao oar oat ob- oba obb obe obg obi obk obl obo obr obt oea oeb oee oeg oei oel oeo oer oet oga oge ogg ogi ogl ogo ogt oia oib oie oii oik oil oio oir oit oka okb oke okg oki okk okl oko okr ola olb ole olg oli olk oll olo olt oo- ooa oob oog ooi ook ool ooo oor oot or- ora orb ore org ori ork orl oro orr ort ot- ota otb ote otg oti otk otl oto otr ott ra- raa rab rae rag rai rak ral rao rar rat rba rbb rbe rbg rbi rbk rbl rbo rbr rbt re- rea reb ree reg rei rek rel reo rer ret rga rgb rge rgg rgi rgk rgo rgr rgt ria rib rie rig rii rik ril rio rir rit rkb rke rkg rkk rko rkt rla rle rlg rli rll rlo rlr rlt roa rob roe rog roi rok rol roo ror rot rra rrb rrg rri rrk rrl rrr rrt rta rtb rte rtg rti rtk rtl rto rtr rtt taa tab tae tag tai tak tal tao tar tat tba tbb tbe tbg tbi tbk tbl tbo tbr tbt te- tea teb tee teg tei tek tel teo ter tet tga tgb tge tgg tgi tgk tgl tgo tgr tgt tia tib tie tig tii tik til tio tir tit tka tkb tke tkg tkk tkl tko tkr tkt tla tle tlg tli tlk tll tlo tlr tlt to- toa tob toe tog toi tok tol too tor tot tra trb tre trg tri trk trl tro trr trt tta ttb tte ttg tti ttk ttl tto ttr ttt