-al -ol a-a a-b a-i aaa aab aai aak aal aan aao aar ab- aba abb abi abk abl abn abo abr ai- aia aib aii aik ail ain aio air aka akb aki akk akl akn ako akr al- ala alb ali alk all aln alo alr an- ana anb ani ank anl ann ano anr aoa aob aoi aok aol aon aoo aor ar- ara arb ari ark arl arn aro arr baa bab bai bak bal ban bao bar bba bbb bbi bbk bbl bbn bbo bbr bi- bia bib bii bik bil bin bio bir bka bkb bkk bkl bkn bko bkr bla blb bli blk bll bln blo blr bna bnb bni bnk bnl bnn bno bnr boa bob boi bok bol bon boo bor bra brb bri brk brl brn bro brr ia- iaa iab iai ial ian iao iar iba ibb ibi ibk ibl ibn ibo ibr iia iib iii iil iin iio iir ika ikb iki ikk ikl iko ikr il- ila ilb ili ilk ill iln ilo ilr in- ina inb ini ink inl inn ino inr io- ioa iob ioi iol ion ioo ior ir- ira irb iri irk irl irn iro irr ka- kaa kab kai kak kal kan kao kar kba kbb kbi kbk kbl kbn kbo kbr kia kib kii kik kil kin kio kir kkb kki kkk kkl kkn kkr kl- kla klb kli klo klr kn- kna kni knk knl knn kno knr koa kob koi kok kol kon koo kor kra kri krk krl krn kro krr la- laa lab lai lak lal lan lao lar lba lbb lbi lbk lbl lbo lbr lia lib lii lik lil lin lio lir lka lkb lkl lkr lla llb lli llk lll lln llo llr lna lnb lni lnk lnl lnn lno lnr loa lob loi lok lol lon loo lor lra lrb lri lrk lrn lro lrr n-i naa nab nai nak nal nan nao nar nba nbb nbi nbk nbl nbn nbo nbr nia nib nii nik nil nin nio nir nka nki nkk nkn nko nkr nla nlb nli nlk nll nln nlo nlr nna nnb nni nnk nnl nnn nno no- noa nob noi nok nol non noo nor nra nrb nri nrk nrl nrn nro nrr o-i oaa oab oai oak oal oan oao oar ob- oba obb obi obk obl obn obo obr oia oib oii oik oil oin oio oir oka okb oki okk okl oko okr ola olb oli olk oll oln olo on- ona onb oni onk onl onn ono onr oo- ooa oob ooi ook ool oon ooo oor or- ora orb ori ork orl orn oro orr ra- raa rab rai rak ral ran rao rar rba rbb rbi rbk rbl rbn rbo rbr ria rib rii rik ril rin rio rir rkb rkk rko rla rli rll rln rlo rlr rna rnb rni rnn rno rnr roa rob roi rok rol ron roo ror rra rrb rri rrk rrl rrn rrr