-al -ol a-a a-b aaa aab aad aak aal aao aar aau ab- aba abb abd abk abl abo abr abu ad- ada adb add adk adl ado adr adu aka akb akd akk akl ako akr aku al- ala alb ald alk all alo alr alu aoa aob aod aok aol aoo aor aou ar- ara arb ard ark arl aro arr aru au- aua aub aud auk aul auo aur b-u baa bab bad bak bal bao bar bau bba bbb bbd bbk bbl bbo bbr bbu bda bdb bdd bdk bdl bdo bdr bdu bka bkb bkk bkl bko bkr bla blb bld blk bll blo blr blu boa bob bod bok bol boo bor bou bra brb brd brk brl bro brr bru bua bub bud buk bul buo bur buu daa dab dad dak dal dao dar dau dba dbb dbd dbk dbl dbo dbr dbu dda ddb ddd ddk ddl ddo ddr ddu dka dkb dkk dkl dko dkr dku dl- dla dlb dld dlk dll dlo dlr dlu doa dob dod dok dol doo dor dou dra drb drd drk drl dro drr dru dua dub dud duk dul duo dur ka- kaa kab kad kak kal kao kar kau kba kbb kbd kbk kbl kbo kbr kbu kda kdb kdk kdl kdo kdr kdu kkb kkk kkl kkr kku kl- kla klb kld klo klr klu koa kob kod kok kol koo kor kou kra krd krk krl kro krr kru kub kud kuk kul kur kuu la- laa lab lad lak lal lao lar lau lba lbb lbd lbk lbl lbo lbr lbu lda ldb ldd ldk ldl ldo ldr ldu lka lkb lkl lkr lla llb lld llk lll llo llr llu loa lob lod lok lol loo lor lou lra lrb lrd lrk lro lrr lru lua lub lud luk lul luo lur luu oaa oab oad oak oal oao oar oau ob- oba obb obd obk obl obo obr obu oda odb odd odl odo odr odu oka okb okd okk okl oko okr oku ola olb old olk oll olo olu oo- ooa oob ood ook ool ooo oor or- ora orb ord ork orl oro orr oru ou- oua oud ouk oul ouo our ra- raa rab rad rak ral rao rar rau rba rbb rbd rbk rbl rbo rbr rbu rda rdb rdd rdl rdo rdr rdu rkb rkk rko rku rla rld rll rlo rlr rlu roa rob rod rok rol roo ror rou rra rrb rrd rrk rrl rrr rru rua rub rud ruk ruo rur ruu ua- uaa uab uad uak ual uao uar uau uba ubb ubk ubl ubo ubr ubu uda udb udd udk udl udo udr udu uka ukb ukk ukl ukr uku ula ulb uld ulk ull ulo ulr ulu uoa uob uod uok uol uoo uor ur- ura urb urd urk url uro urr uru uua uur uuu