-al -ol a-a a-b aaa aab aak aal aao aar aav ab- aba abb abk abl abo abr abv aka akb akk akl ako akr akv al- ala alb alk all alo alr alv aoa aob aok aol aoo aor aov ar- ara arb ark arl aro arr arv av- ava avb avk avl avo avr baa bab bak bal bao bar bav bba bbb bbk bbl bbo bbr bka bkb bkk bkl bko bkr bkv bla blb blk bll blo blr blv boa bob bok bol boo bor bov bra brb brk brl bro brr brv bva bvb bvk bvl bvo bvr bvv ka- kaa kab kak kal kao kar kav kba kbb kbk kbl kbo kbr kkb kkk kkl kkr kkv kl- kla klb klo klr klv koa kob kok kol koo kor kra krk krl kro krr krv kva kvb kvk kvo kvr kvv la- laa lab lak lal lao lar lav lba lbb lbk lbl lbo lbr lbv lka lkb lkl lkr lla llb llk lll llo llr llv loa lob lok lol loo lor lov lra lrb lrk lro lrr lrv lva lvb lvl lvr lvv oaa oab oak oal oao oar oav ob- oba obb obk obl obo obr obv oka okb okk okl oko okr ola olb olk oll olo oo- ooa oob ook ool ooo oor oov or- ora orb ork orl oro orr orv ov- ova ovb ovl ovo ovv ra- raa rab rak ral rao rar rav rba rbb rbk rbl rbo rbr rkb rkk rko rkv rla rll rlo rlr roa rob rok rol roo ror rov rra rrb rrk rrl rrr rva rvb rvl rvo rvr rvv v-a vaa vab vak val vao var vav vba vbk vbl vbo vbr vbv vka vkb vl- vla vlb vlk vll vlo vlv voa vob vok vol voo vor vov vra vrb vrk vrr vva vvb vvo vvr vvv