-al -ol a-a a-b aaa aab aal aan aao aau ab- aba abb abl abn abo abu al- ala alb all aln alo alu an- ana anb anl ann ano anu aoa aob aol aon aoo aou au- aua aub aul aun auo b-u baa bab bal ban bao bau bba bbb bbl bbn bbo bbu bla blb bll bln blo blu bna bnb bnl bnn bno bnu boa bob bol bon boo bou bua bub bul bun buo buu la- laa lab lal lan lao lau lba lbb lbl lbo lbu lla llb lll lln llo llu lna lnb lnl lnn lno lnu loa lob lol lon loo lou lua lub lul lun luo luu naa nab nal nan nao nau nba nbb nbl nbn nbo nbu nla nlb nll nln nlo nlu nna nnb nnl nnn nno nnu no- noa nob nol non noo nou nua nub nul nun nuo nuu oaa oab oal oan oao oau ob- oba obb obl obn obo obu ola olb oll oln olo olu on- ona onb onl onn ono onu oo- ooa oob ool oon ooo ou- oua oul oun ouo ua- uaa uab ual uan uao uau uba ubb ubl ubn ubo ubu ula ulb ull uln ulo ulu un- una unb unl unn uno unu uoa uob uol uon uoo uua uun uuu