-al -ol a-a a-b a-i aaa aab aai aak aal aan aao aas ab- aba abb abi abk abl abn abo abs ai- aia aib aii aik ail ain aio ais aka akb aki akk akl akn ako aks al- ala alb ali alk all aln alo als an- ana anb ani ank anl ann ano ans aoa aob aoi aok aol aon aoo aos as- asa asb asi ask asl asn aso ass baa bab bai bak bal ban bao bas bba bbb bbi bbk bbl bbn bbo bbs bi- bia bib bii bik bil bin bio bis bka bkb bkk bkl bkn bko bks bla blb bli blk bll bln blo bls bna bnb bni bnk bnl bnn bno bns boa bob boi bok bol bon boo bos bsa bsb bsi bsk bsl bsn bso bss ia- iaa iab iai ial ian iao ias iba ibb ibi ibk ibl ibn ibo ibs iia iib iii iil iin iio iis ika ikb iki ikk ikl iko iks il- ila ilb ili ilk ill iln ilo ils in- ina inb ini ink inl inn ino ins io- ioa iob ioi iol ion ioo ios is- isa isb isi isk isl isn iso iss ka- kaa kab kai kak kal kan kao kas kba kbb kbi kbk kbl kbn kbo kbs kia kib kii kik kil kin kio kis kkb kki kkk kkl kkn kks kl- kla klb kli klo kls kn- kna kni knk knl knn kno koa kob koi kok kol kon koo kos ksa ksb ksi ksk ksl ksn kso kss la- laa lab lai lak lal lan lao las lba lbb lbi lbk lbl lbo lbs lia lib lii lik lil lin lio lis lka lkb lkl lks lla llb lli llk lll lln llo lls lna lnb lni lnk lnl lnn lno lns loa lob loi lok lol lon loo los lsa lsb lsi lsk lsl lsn lso lss n-i naa nab nai nak nal nan nao nas nba nbb nbi nbk nbl nbn nbo nbs nia nib nii nik nil nin nio nis nka nki nkk nkn nko nks nla nlb nli nlk nll nln nlo nls nna nnb nni nnk nnl nnn nno nns no- noa nob noi nok nol non noo nos nsa nsb nsi nsk nsl nsn nso nss o-i oaa oab oai oak oal oan oao oas ob- oba obb obi obk obl obn obo obs oia oib oii oik oil oin oio ois oka okb oki okk okl oko oks ola olb oli olk oll oln olo ols on- ona onb oni onk onl onn ono ons oo- ooa oob ooi ook ool oon ooo oos os- osa osb osi osk osl osn oso oss saa sab sai sak sal san sao sas sba sbb sbi sbk sbl sbn sbo sbs sia sib sii sik sil sin sio sis sk- ska skb ski skk skl sko sks sla slb sli slk sll sln slo sls sna snb sni snk snl snn sno sns soa sob soi sok sol son soo sos ss- ssa ssb ssi ssk ssl ssn sso sss