a-a a-b a-i aaa aab aai aan aar aas aau ab- aba abb abi abn abr abs abu ai- aia aib aii ain air ais aiu an- ana anb ani ann anr ans anu ar- ara arb ari arn arr ars aru as- asa asb asi asn asr ass asu au- aua aub aui aun aur aus b-u baa bab bai ban bar bas bau bba bbb bbi bbn bbr bbs bbu bi- bia bib bii bin bir bis biu bna bnb bni bnn bnr bns bnu bra brb bri brn brr brs bru bsa bsb bsi bsn bsr bss bsu bua bub bui bun bur bus buu ia- iaa iab iai ian iar ias iau iba ibb ibi ibn ibr ibs ibu iia iib iii iin iir iis iiu in- ina inb ini inn inr ins inu ir- ira irb iri irn irr irs iru is- isa isb isi isn isr iss isu iu- iua iub iui iur ius n-i naa nab nai nan nar nas nau nba nbb nbi nbn nbr nbs nbu nia nib nii nin nir nis niu nna nnb nni nnn nns nnu nra nrb nri nrn nrr nrs nru nsa nsb nsi nsn nsr nss nsu nua nub nui nun nur nus nuu ra- raa rab rai ran rar ras rau rba rbb rbi rbn rbr rbs rbu ria rib rii rin rir ris rna rnb rni rnn rnr rns rnu rra rrb rri rrn rrr rrs rru rsa rsb rsi rsn rsr rss rsu rua rub rui run rur rus ruu saa sab sai san sar sas sau sba sbb sbi sbn sbr sbs sbu sia sib sii sin sir sis siu sna snb sni snn snr sns snu sr- sra srb sri srn srr srs ss- ssa ssb ssi ssn ssr sss ssu sua sub sui sun sur sus suu ua- uaa uab uai uan uar uas uau uba ubb ubi ubn ubr ubs ubu uia uib uii uin uir uis uiu un- una unb uni unn unr uns unu ur- ura urb uri urn urr urs uru usa usb usi usn usr uss usu uua uun uur uus uuu