-al -ol a-a a-b aaa aab aak aal aan aao aas ab- aba abb abk abl abn abo abs aka akb akk akl akn ako aks al- ala alb alk all aln alo als an- ana anb ank anl ann ano ans aoa aob aok aol aon aoo aos as- asa asb ask asl asn aso ass baa bab bak bal ban bao bas bba bbb bbk bbl bbn bbo bbs bka bkb bkk bkl bkn bko bks bla blb blk bll bln blo bls bna bnb bnk bnl bnn bno bns boa bob bok bol bon boo bos bsa bsb bsk bsl bsn bso bss ka- kaa kab kak kal kan kao kas kba kbb kbk kbl kbn kbo kbs kkb kkk kkl kkn kks kl- kla klb klo kls kn- kna knk knl knn kno koa kob kok kol kon koo kos ksa ksb ksk ksl ksn kso kss la- laa lab lak lal lan lao las lba lbb lbk lbl lbo lbs lka lkb lkl lks lla llb llk lll lln llo lls lna lnb lnk lnl lnn lno lns loa lob lok lol lon loo los lsa lsb lsk lsl lsn lso lss naa nab nak nal nan nao nas nba nbb nbk nbl nbn nbo nbs nka nkk nkn nko nks nla nlb nlk nll nln nlo nls nna nnb nnk nnl nnn nno nns no- noa nob nok nol non noo nos nsa nsb nsk nsl nsn nso nss oaa oab oak oal oan oao oas ob- oba obb obk obl obn obo obs oka okb okk okl oko oks ola olb olk oll oln olo ols on- ona onb onk onl onn ono ons oo- ooa oob ook ool oon ooo oos os- osa osb osk osl osn oso oss saa sab sak sal san sao sas sba sbb sbk sbl sbn sbo sbs sk- ska skb skk skl sko sks sla slb slk sll sln slo sls sna snb snk snl snn sno sns soa sob sok sol son soo sos ss- ssa ssb ssk ssl ssn sso sss