-al -er -ol a-a a-b a-i a-t aaa aab aae aag aai aal aao aar aat ab- aba abb abe abg abi abl abo abr abt aea aeb aee aeg aei ael aeo aer aet ag- aga agb age agg agi agl ago agr agt ai- aia aib aie aig aii ail aio air ait al- ala alb ale alg ali all alo alr alt aoa aob aoe aog aoi aol aoo aor aot ar- ara arb are arg ari arl aro arr art at- ata atb ate atg ati atl ato atr att baa bab bae bag bai bal bao bar bat bba bbb bbe bbg bbi bbl bbo bbr bbt be- bea beb bee beg bei bel beo ber bet bga bgb bge bgg bgi bgl bgo bgr bgt bi- bia bib bie big bii bil bio bir bit bla blb ble blg bli bll blo blr blt boa bob boe bog boi bol boo bor bot bra brb bre brg bri brl bro brr brt bta btb bte btg bti btl bto btr btt eaa eab eae eag eai eal eao ear eat eba ebb ebe ebg ebi ebl ebo ebr ebt eea eeb eee eeg eel eeo eer eet ega egb ege egg egi egl ego egr egt eia eib eie eig eii eil eio eir eit ela elb ele elg eli ell elo elr elt eo- eoa eob eoe eog eoi eol eoo eor eot era erb ere erg eri erl ero err ert eta etb ete etg eti etl eto etr ett gaa gab gae gag gai gal gao gar gat gba gbe gbg gbi gbl gbo gbr gbt ge- gea geb gee geg gei gel geo ger get gga ggb ggg ggi ggo ggr ggt gia gib gie gig gii gil gio gir git gla glb gle glg gli gll glo glr glt goa gob goe gog goi gol goo gor got gra grb gre grg gri grl gro grr grt gta gtb gte gtg gti gtl gto gtr gtt ia- iaa iab iae iag iai ial iao iar iat iba ibb ibe ibg ibi ibl ibo ibr ibt ie- iea iee ieg iei iel ier iet iga igb ige igg igi igl igo igr igt iia iib iie iii iil iio iir iit il- ila ilb ile ilg ili ill ilo ilr ilt io- ioa iob ioe iog ioi iol ioo ior iot ir- ira irb ire irg iri irl iro irr irt ita itb ite itg iti itl ito itt la- laa lab lae lag lai lal lao lar lat lba lbb lbe lbg lbi lbl lbo lbr lbt lea leb lee leg lei lel leo ler let lga lgb lge lgg lgi lgl lgo lgr lgt lia lib lie lig lii lil lio lir lit lla llb lle llg lli lll llo llr llt loa lob loe log loi lol loo lor lot lra lrb lrg lri lro lrr lrt lta ltb lte ltg lti ltl lto ltr ltt o-i oaa oab oae oag oai oal oao oar oat ob- oba obb obe obg obi obl obo obr obt oea oeb oee oeg oei oel oeo oer oet oga oge ogg ogi ogl ogo ogt oia oib oie oii oil oio oir oit ola olb ole olg oli oll olo olt oo- ooa oob oog ooi ool ooo oor oot or- ora orb ore org ori orl oro orr ort ot- ota otb ote otg oti otl oto otr ott ra- raa rab rae rag rai ral rao rar rat rba rbb rbe rbg rbi rbl rbo rbr rbt re- rea reb ree reg rei rel reo rer ret rga rgb rge rgg rgi rgo rgr rgt ria rib rie rig rii ril rio rir rit rla rle rlg rli rll rlo rlr rlt roa rob roe rog roi rol roo ror rot rra rrb rrg rri rrl rrr rrt rta rtb rte rtg rti rtl rto rtr rtt taa tab tae tag tai tal tao tar tat tba tbb tbe tbg tbi tbl tbo tbr tbt te- tea teb tee teg tei tel teo ter tet tga tgb tge tgg tgi tgl tgo tgr tgt tia tib tie tig tii til tio tir tit tla tle tlg tli tll tlo tlr tlt to- toa tob toe tog toi tol too tor tot tra trb tre trg tri trl tro trr trt tta ttb tte ttg tti ttl tto ttr ttt