-al -er -ol a-a a-b a-i aaa aab aae aaf aag aai aal aao aar ab- aba abb abe abf abg abi abl abo abr aea aeb aee aef aeg aei ael aeo aer af- afa afb afe aff afg afi afl afo afr ag- aga agb age agf agg agi agl ago agr ai- aia aib aie aif aig aii ail aio air al- ala alb ale alf alg ali all alo alr aoa aob aoe aof aog aoi aol aoo aor ar- ara arb are arf arg ari arl aro arr baa bab bae baf bag bai bal bao bar bba bbb bbe bbf bbg bbi bbl bbo bbr be- bea beb bee bef beg bei bel beo ber bfa bfb bfe bff bfg bfi bfl bfo bfr bga bgb bge bgf bgg bgi bgl bgo bgr bi- bia bib bie bif big bii bil bio bir bla blb ble blf blg bli bll blo blr boa bob boe bof bog boi bol boo bor bra brb bre brf brg bri brl bro brr eaa eab eae eaf eag eai eal eao ear eba ebb ebe ebf ebg ebi ebl ebo ebr eea eeb eee eef eeg eel eeo eer ef- efa efb efe eff efg efi efl efo efr ega egb ege egf egg egi egl ego egr eia eib eie eif eig eii eil eio eir ela elb ele elf elg eli ell elo elr eo- eoa eob eoe eof eog eoi eol eoo eor era erb ere erf erg eri erl ero err faa fab fae faf fag fai fal fao far fba fbb fbe fbf fbg fbi fbl fbo fbr fea feb fee fef feg fei fel feo fer ffa ffe fff ffg ffi ffl ffo ffr fga fgb fge fgf fgg fgi fgl fgr fia fib fie fif fig fii fil fir fla flb fle flf flg fli fll flo flr foa fob foe fof fog foi fol foo for fra frb fre frf frg fri frl fro frr gaa gab gae gaf gag gai gal gao gar gba gbe gbf gbg gbi gbl gbo gbr ge- gea geb gee gef geg gei gel geo ger gfa gfb gfe gff gfi gfl gfo gfr gga ggb ggg ggi ggo ggr gia gib gie gif gig gii gil gio gir gla glb gle glf glg gli gll glo glr goa gob goe gof gog goi gol goo gor gra grb gre grf grg gri grl gro grr i-f ia- iaa iab iae iaf iag iai ial iao iar iba ibb ibe ibf ibg ibi ibl ibo ibr ie- iea iee ief ieg iei iel ier ifa ifb ife iff ifg ifi ifl ifo ifr iga igb ige igf igg igi igl igo igr iia iib iie iif iii iil iio iir il- ila ilb ile ilf ilg ili ill ilo ilr io- ioa iob ioe iof iog ioi iol ioo ior ir- ira irb ire irf irg iri irl iro irr la- laa lab lae laf lag lai lal lao lar lba lbb lbe lbf lbg lbi lbl lbo lbr lea leb lee lef leg lei lel leo ler lfa lfb lfe lff lfg lfi lfl lfo lfr lga lgb lge lgf lgg lgi lgl lgo lgr lia lib lie lif lig lii lil lio lir lla llb lle llf llg lli lll llo llr loa lob loe lof log loi lol loo lor lra lrb lrf lrg lri lro lrr o-i oaa oab oae oaf oag oai oal oao oar ob- oba obb obe obf obg obi obl obo obr oea oeb oee oef oeg oei oel oeo oer of- ofa ofb ofe off ofg ofi ofl ofo ofr oga oge ogf ogg ogi ogl ogo oia oib oie oif oii oil oio oir ola olb ole olf olg oli oll olo oo- ooa oob oof oog ooi ool ooo oor or- ora orb ore orf org ori orl oro orr ra- raa rab rae raf rag rai ral rao rar rba rbb rbe rbf rbg rbi rbl rbo rbr re- rea reb ree ref reg rei rel reo rer rfa rfb rfe rff rfg rfi rfl rfo rfr rga rgb rge rgf rgg rgi rgo rgr ria rib rie rif rig rii ril rio rir rla rle rlf rlg rli rll rlo rlr roa rob roe rof rog roi rol roo ror rra rrb rrf rrg rri rrl rrr