-al -ol a-a a-b aaa aab aag aal aan aao aar aas ab- aba abb abg abl abn abo abr abs ag- aga agb agg agl agn ago agr ags al- ala alb alg all aln alo alr als an- ana anb ang anl ann ano anr ans aoa aob aog aol aon aoo aor aos ar- ara arb arg arl arn aro arr ars as- asa asb asg asl asn aso asr ass baa bab bag bal ban bao bar bas bba bbb bbg bbl bbn bbo bbr bbs bga bgb bgg bgl bgn bgo bgr bgs bla blb blg bll bln blo blr bls bna bnb bng bnl bnn bno bnr bns boa bob bog bol bon boo bor bos bra brb brg brl brn bro brr brs bsa bsb bsg bsl bsn bso bsr bss gaa gab gag gal gan gao gar gas gba gbg gbl gbn gbo gbr gbs gga ggb ggg ggn ggo ggr ggs gla glb glg gll gln glo glr gls gna gnb gnl gnn gno gnr gns goa gob gog gol gon goo gor gos gra grb grg grl grn gro grr grs gsa gsb gsg gsl gsn gso gsr gss la- laa lab lag lal lan lao lar las lba lbb lbg lbl lbo lbr lbs lga lgb lgg lgl lgn lgo lgr lgs lla llb llg lll lln llo llr lls lna lnb lng lnl lnn lno lnr lns loa lob log lol lon loo lor los lra lrb lrg lrn lro lrr lrs lsa lsb lsg lsl lsn lso lsr lss naa nab nag nal nan nao nar nas nba nbb nbg nbl nbn nbo nbr nbs nga ngb ngg ngl ngn ngo ngs nla nlb nlg nll nln nlo nlr nls nna nnb nng nnl nnn nno nns no- noa nob nog nol non noo nor nos nra nrb nrg nrl nrn nro nrr nrs nsa nsb nsg nsl nsn nso nsr nss oaa oab oag oal oan oao oar oas ob- oba obb obg obl obn obo obr obs oga ogg ogl ogn ogo ogs ola olb olg oll oln olo ols on- ona onb ong onl onn ono onr ons oo- ooa oob oog ool oon ooo oor oos or- ora orb org orl orn oro orr ors os- osa osb osg osl osn oso osr oss ra- raa rab rag ral ran rao rar ras rba rbb rbg rbl rbn rbo rbr rbs rga rgb rgg rgn rgo rgr rgs rla rlg rll rln rlo rlr rls rna rnb rng rnn rno rnr rns roa rob rog rol ron roo ror ros rra rrb rrg rrl rrn rrr rrs rsa rsb rsg rsl rsn rso rsr rss saa sab sag sal san sao sar sas sba sbb sbg sbl sbn sbo sbr sbs sga sgb sgg sgl sgn sgo sgr sgs sla slb slg sll sln slo slr sls sna snb sng snl snn sno snr sns soa sob sog sol son soo sor sos sr- sra srb srg srl srn sro srr srs ss- ssa ssb ssg ssl ssn sso ssr sss