-er a-a a-b a-i aaa aab aae aai aan aar aas aau ab- aba abb abe abi abn abr abs abu aea aeb aee aei aen aer aes aeu ai- aia aib aie aii ain air ais aiu an- ana anb ane ani ann anr ans anu ar- ara arb are ari arn arr ars aru as- asa asb ase asi asn asr ass asu au- aua aub aue aui aun aur aus b-u baa bab bae bai ban bar bas bau bba bbb bbe bbi bbn bbr bbs bbu be- bea beb bee bei ben ber bes beu bi- bia bib bie bii bin bir bis biu bna bnb bne bni bnn bnr bns bnu bra brb bre bri brn brr brs bru bsa bsb bse bsi bsn bsr bss bsu bua bub bue bui bun bur bus buu eaa eab eae eai ean ear eas eau eba ebb ebe ebi ebn ebr ebs ebu eea eeb eee een eer ees eia eib eie eii ein eir eis eiu en- ena enb ene eni enn enr ens enu era erb ere eri ern err ers eru es- esa esb ese esi esn esr ess esu eu- eua eub eue eui eun eur eus ia- iaa iab iae iai ian iar ias iau iba ibb ibe ibi ibn ibr ibs ibu ie- iea iee iei ien ier ies iia iib iie iii iin iir iis iiu in- ina inb ine ini inn inr ins inu ir- ira irb ire iri irn irr irs iru is- isa isb ise isi isn isr iss isu iu- iua iub iue iui iur ius n-i naa nab nae nai nan nar nas nau nba nbb nbe nbi nbn nbr nbs nbu ne- nea neb nee nei nen ner nes neu nia nib nie nii nin nir nis niu nna nnb nne nni nnn nns nnu nra nrb nre nri nrn nrr nrs nru nsa nsb nse nsi nsn nsr nss nsu nua nub nue nui nun nur nus nuu ra- raa rab rae rai ran rar ras rau rba rbb rbe rbi rbn rbr rbs rbu re- rea reb ree rei ren rer res reu ria rib rie rii rin rir ris rna rnb rni rnn rnr rns rnu rra rrb rri rrn rrr rrs rru rsa rsb rse rsi rsn rsr rss rsu rua rub rue rui run rur rus ruu saa sab sae sai san sar sas sau sba sbb sbe sbi sbn sbr sbs sbu se- sea seb see sei sen ser ses seu sia sib sie sii sin sir sis siu sna snb sne sni snn snr sns snu sr- sra srb sre sri srn srr srs ss- ssa ssb sse ssi ssn ssr sss ssu sua sub sue sui sun sur sus suu ua- uaa uab uae uai uan uar uas uau uba ubb ube ubi ubn ubr ubs ubu uea ueb uee uei uen uer ues uia uib uie uii uin uir uis uiu un- una unb une uni unn unr uns unu ur- ura urb ure uri urn urr urs uru usa usb use usi usn usr uss usu uua uue uun uur uus uuu