-al -ol a-a a-b aaa aab aak aal aao aas aav ab- aba abb abk abl abo abs abv aka akb akk akl ako aks akv al- ala alb alk all alo als alv aoa aob aok aol aoo aos aov as- asa asb ask asl aso ass asv av- ava avb avk avl avo avs baa bab bak bal bao bas bav bba bbb bbk bbl bbo bbs bka bkb bkk bkl bko bks bkv bla blb blk bll blo bls blv boa bob bok bol boo bos bov bsa bsb bsk bsl bso bss bsv bva bvb bvk bvl bvo bvs bvv ka- kaa kab kak kal kao kas kav kba kbb kbk kbl kbo kbs kkb kkk kkl kks kkv kl- kla klb klo kls klv koa kob kok kol koo kos ksa ksb ksk ksl kso kss ksv kva kvb kvk kvo kvs kvv la- laa lab lak lal lao las lav lba lbb lbk lbl lbo lbs lbv lka lkb lkl lks lla llb llk lll llo lls llv loa lob lok lol loo los lov lsa lsb lsk lsl lso lss lsv lva lvb lvl lvs lvv oaa oab oak oal oao oas oav ob- oba obb obk obl obo obs obv oka okb okk okl oko oks ola olb olk oll olo ols oo- ooa oob ook ool ooo oos oov os- osa osb osk osl oso oss osv ov- ova ovb ovl ovo ovs ovv saa sab sak sal sao sas sav sba sbb sbk sbl sbo sbs sbv sk- ska skb skk skl sko sks sla slb slk sll slo sls slv soa sob sok sol soo sos sov ss- ssa ssb ssk ssl sso sss ssv sva svb svk svl svo svs svv v-a vaa vab vak val vao vas vav vba vbk vbl vbo vbs vbv vka vkb vl- vla vlb vlk vll vlo vls vlv voa vob vok vol voo vos vov vsa vsb vsk vsl vso vss vsv vva vvb vvo vvs vvv