a-a a-b a-i aaa aab aai aak aan aao aas aau ab- aba abb abi abk abn abo abs abu ai- aia aib aii aik ain aio ais aiu aka akb aki akk akn ako aks aku an- ana anb ani ank ann ano ans anu aoa aob aoi aok aon aoo aos aou as- asa asb asi ask asn aso ass asu au- aua aub aui auk aun auo aus b-u baa bab bai bak ban bao bas bau bba bbb bbi bbk bbn bbo bbs bbu bi- bia bib bii bik bin bio bis biu bka bkb bkk bkn bko bks bna bnb bni bnk bnn bno bns bnu boa bob boi bok bon boo bos bou bsa bsb bsi bsk bsn bso bss bsu bua bub bui buk bun buo bus buu ia- iaa iab iai ian iao ias iau iba ibb ibi ibk ibn ibo ibs ibu iia iib iii iin iio iis iiu ika ikb iki ikk iko iks iku in- ina inb ini ink inn ino ins inu io- ioa iob ioi ion ioo ios iou is- isa isb isi isk isn iso iss isu iu- iua iub iui ius ka- kaa kab kai kak kan kao kas kau kba kbb kbi kbk kbn kbo kbs kbu kia kib kii kik kin kio kis kiu kkb kki kkk kkn kks kku kn- kna kni knk knn kno knu koa kob koi kok kon koo kos kou ksa ksb ksi ksk ksn kso kss ksu kub kui kuk kun kus kuu n-i naa nab nai nak nan nao nas nau nba nbb nbi nbk nbn nbo nbs nbu nia nib nii nik nin nio nis niu nka nki nkk nkn nko nks nku nna nnb nni nnk nnn nno nns nnu no- noa nob noi nok non noo nos nou nsa nsb nsi nsk nsn nso nss nsu nua nub nui nuk nun nuo nus nuu o-i oaa oab oai oak oan oao oas oau ob- oba obb obi obk obn obo obs obu oia oib oii oik oin oio ois oiu oka okb oki okk oko oks oku on- ona onb oni onk onn ono ons onu oo- ooa oob ooi ook oon ooo oos os- osa osb osi osk osn oso oss osu ou- oua oui ouk oun ouo ous saa sab sai sak san sao sas sau sba sbb sbi sbk sbn sbo sbs sbu sia sib sii sik sin sio sis siu sk- ska skb ski skk sko sks sku sna snb sni snk snn sno sns snu soa sob soi sok son soo sos sou ss- ssa ssb ssi ssk ssn sso sss ssu sua sub sui suk sun suo sus suu ua- uaa uab uai uak uan uao uas uau uba ubb ubi ubk ubn ubo ubs ubu uia uib uii uin uio uis uiu uka ukb uki ukk ukn uku un- una unb uni unk unn uno uns unu uoa uob uok uon uoo uos usa usb usi usk usn uso uss usu uua uun uus uuu