-er b-u bbb bbe bbi bbn bbr bbs bbu be- beb bee bei ben ber bes beu bi- bib bie bii bin bir bis biu bnb bne bni bnn bnr bns bnu brb bre bri brn brr brs bru bsb bse bsi bsn bsr bss bsu bub bue bui bun bur bus buu ebb ebe ebi ebn ebr ebs ebu eeb eee een eer ees eib eie eii ein eir eis eiu en- enb ene eni enn enr ens enu erb ere eri ern err ers eru es- esb ese esi esn esr ess esu eu- eub eue eui eun eur eus ibb ibe ibi ibn ibr ibs ibu ie- iee iei ien ier ies iib iie iii iin iir iis iiu in- inb ine ini inn inr ins inu ir- irb ire iri irn irr irs iru is- isb ise isi isn isr iss isu iu- iub iue iui iur ius n-i nbb nbe nbi nbn nbr nbs nbu ne- neb nee nei nen ner nes neu nib nie nii nin nir nis niu nnb nne nni nnn nns nnu nrb nre nri nrn nrr nrs nru nsb nse nsi nsn nsr nss nsu nub nue nui nun nur nus nuu rbb rbe rbi rbn rbr rbs rbu re- reb ree rei ren rer res reu rib rie rii rin rir ris rnb rni rnn rnr rns rnu rrb rri rrn rrr rrs rru rsb rse rsi rsn rsr rss rsu rub rue rui run rur rus ruu sbb sbe sbi sbn sbr sbs sbu se- seb see sei sen ser ses seu sib sie sii sin sir sis siu snb sne sni snn snr sns snu sr- srb sre sri srn srr srs ss- ssb sse ssi ssn ssr sss ssu sub sue sui sun sur sus suu ubb ube ubi ubn ubr ubs ubu ueb uee uei uen uer ues uib uie uii uin uir uis uiu un- unb une uni unn unr uns unu ur- urb ure uri urn urr urs uru usb use usi usn usr uss usu uue uun uur uus uuu