-er b-u bbb bbe bbi bbn bbr bbs bbt bbu be- beb bee bei ben ber bes bet beu bi- bib bie bii bin bir bis bit biu bnb bne bni bnn bnr bns bnt bnu brb bre bri brn brr brs brt bru bsb bse bsi bsn bsr bss bst bsu btb bte bti btn btr bts btt btu bub bue bui bun bur bus but buu ebb ebe ebi ebn ebr ebs ebt ebu eeb eee een eer ees eet eib eie eii ein eir eis eit eiu en- enb ene eni enn enr ens ent enu erb ere eri ern err ers ert eru es- esb ese esi esn esr ess est esu etb ete eti etn etr ets ett etu eu- eub eue eui eun eur eus eut ibb ibe ibi ibn ibr ibs ibt ibu ie- iee iei ien ier ies iet iib iie iii iin iir iis iit iiu in- inb ine ini inn inr ins int inu ir- irb ire iri irn irr irs irt iru is- isb ise isi isn isr iss ist isu itb ite iti itn its itt itu iu- iub iue iui iur ius iut n-i nbb nbe nbi nbn nbr nbs nbt nbu ne- neb nee nei nen ner nes net neu nib nie nii nin nir nis nit niu nnb nne nni nnn nns nnt nnu nrb nre nri nrn nrr nrs nrt nru nsb nse nsi nsn nsr nss nst nsu ntb nte nti ntn ntr nts ntt ntu nub nue nui nun nur nus nut nuu rbb rbe rbi rbn rbr rbs rbt rbu re- reb ree rei ren rer res ret reu rib rie rii rin rir ris rit rnb rni rnn rnr rns rnt rnu rrb rri rrn rrr rrs rrt rru rsb rse rsi rsn rsr rss rst rsu rtb rte rti rtn rtr rts rtt rtu rub rue rui run rur rus rut ruu sbb sbe sbi sbn sbr sbs sbt sbu se- seb see sei sen ser ses set seu sib sie sii sin sir sis sit siu snb sne sni snn snr sns snt snu sr- srb sre sri srn srr srs srt ss- ssb sse ssi ssn ssr sss sst ssu stb ste sti stn str sts stt stu sub sue sui sun sur sus sut suu tbb tbe tbi tbn tbr tbs tbt tbu te- teb tee tei ten ter tes tet teu tib tie tii tin tir tis tit tiu tnb tne tni tnn tnr tns tnt trb tre tri trn trr trs trt tru tsb tse tsi tsn tsr tss tst tsu ttb tte tti ttn ttr tts ttt ttu tub tue tui tun tur tus tut tuu ubb ube ubi ubn ubr ubs ubt ubu ueb uee uei uen uer ues uet uib uie uii uin uir uis uit uiu un- unb une uni unn unr uns unt unu ur- urb ure uri urn urr urs urt uru usb use usi usn usr uss ust usu utb ute uti utn utr uts utt utu uue uun uur uus uut uuu