-al -ol a-a a-b a-i aaa aab aag aai aal aao aar aas ab- aba abb abg abi abl abo abr abs ag- aga agb agg agi agl ago agr ags ai- aia aib aig aii ail aio air ais al- ala alb alg ali all alo alr als aoa aob aog aoi aol aoo aor aos ar- ara arb arg ari arl aro arr ars as- asa asb asg asi asl aso asr ass baa bab bag bai bal bao bar bas bba bbb bbg bbi bbl bbo bbr bbs bga bgb bgg bgi bgl bgo bgr bgs bi- bia bib big bii bil bio bir bis bla blb blg bli bll blo blr bls boa bob bog boi bol boo bor bos bra brb brg bri brl bro brr brs bsa bsb bsg bsi bsl bso bsr bss gaa gab gag gai gal gao gar gas gba gbg gbi gbl gbo gbr gbs gga ggb ggg ggi ggo ggr ggs gia gib gig gii gil gio gir gis gla glb glg gli gll glo glr gls goa gob gog goi gol goo gor gos gra grb grg gri grl gro grr grs gsa gsb gsg gsi gsl gso gsr gss ia- iaa iab iag iai ial iao iar ias iba ibb ibg ibi ibl ibo ibr ibs iga igb igg igi igl igo igr igs iia iib iii iil iio iir iis il- ila ilb ilg ili ill ilo ilr ils io- ioa iob iog ioi iol ioo ior ios ir- ira irb irg iri irl iro irr irs is- isa isb isg isi isl iso isr iss la- laa lab lag lai lal lao lar las lba lbb lbg lbi lbl lbo lbr lbs lga lgb lgg lgi lgl lgo lgr lgs lia lib lig lii lil lio lir lis lla llb llg lli lll llo llr lls loa lob log loi lol loo lor los lra lrb lrg lri lro lrr lrs lsa lsb lsg lsi lsl lso lsr lss o-i oaa oab oag oai oal oao oar oas ob- oba obb obg obi obl obo obr obs oga ogg ogi ogl ogo ogs oia oib oii oil oio oir ois ola olb olg oli oll olo ols oo- ooa oob oog ooi ool ooo oor oos or- ora orb org ori orl oro orr ors os- osa osb osg osi osl oso osr oss ra- raa rab rag rai ral rao rar ras rba rbb rbg rbi rbl rbo rbr rbs rga rgb rgg rgi rgo rgr rgs ria rib rig rii ril rio rir ris rla rlg rli rll rlo rlr rls roa rob rog roi rol roo ror ros rra rrb rrg rri rrl rrr rrs rsa rsb rsg rsi rsl rso rsr rss saa sab sag sai sal sao sar sas sba sbb sbg sbi sbl sbo sbr sbs sga sgb sgg sgi sgl sgo sgr sgs sia sib sig sii sil sio sir sis sla slb slg sli sll slo slr sls soa sob sog soi sol soo sor sos sr- sra srb srg sri srl sro srr srs ss- ssa ssb ssg ssi ssl sso ssr sss