b-u bbb bbi bbm bbn bbr bbs bbt bbu bi- bib bii bim bin bir bis bit biu bmb bmi bmm bmn bmr bms bmt bmu bnb bni bnn bnr bns bnt bnu brb bri brm brn brr brs brt bru bsb bsi bsm bsn bsr bss bst bsu btb bti btm btn btr bts btt btu bub bui bum bun bur bus but buu ibb ibi ibm ibn ibr ibs ibt ibu iib iii iim iin iir iis iit iiu im- imb imi imm imn ims imt imu in- inb ini inm inn inr ins int inu ir- irb iri irm irn irr irs irt iru is- isb isi ism isn isr iss ist isu itb iti itm itn its itt itu iu- iub iui ium iur ius iut m-r mbb mbi mbm mbr mbs mbt mbu mi- mib mii mim min mir mis mit miu mmb mmi mmm mmn mmr mms mmt mmu mnb mni mnm mnn mnr mns mnt mnu mrb mri mrm mrn mrr mrs mrt mru msb msi msm msn msr mss mst msu mtb mti mtm mtn mtr mts mtt mtu mub mui mum mun mur mus mut muu n-i nbb nbi nbm nbn nbr nbs nbt nbu nib nii nim nin nir nis nit niu nmb nmi nmm nmn nmr nms nmt nmu nnb nni nnm nnn nns nnt nnu nrb nri nrm nrn nrr nrs nrt nru nsb nsi nsm nsn nsr nss nst nsu ntb nti ntm ntn ntr nts ntt ntu nub nui num nun nur nus nut nuu rbb rbi rbm rbn rbr rbs rbt rbu rib rii rim rin rir ris rit rmb rmi rmm rmn rmr rms rmt rnb rni rnm rnn rnr rns rnt rnu rrb rri rrm rrn rrr rrs rrt rru rsb rsi rsm rsn rsr rss rst rsu rtb rti rtm rtn rtr rts rtt rtu rub rui rum run rur rus rut ruu sbb sbi sbm sbn sbr sbs sbt sbu sib sii sim sin sir sis sit siu smb smi smm smn smr sms smt smu snb sni snm snn snr sns snt snu sr- srb sri srm srn srr srs srt ss- ssb ssi ssm ssn ssr sss sst ssu stb sti stm stn str sts stt stu sub sui sum sun sur sus sut suu tbb tbi tbm tbn tbr tbs tbt tbu tib tii tim tin tir tis tit tiu tmb tmi tmm tmn tmr tms tmt tmu tnb tni tnm tnn tnr tns tnt trb tri trm trn trr trs trt tru tsb tsi tsm tsn tsr tss tst tsu ttb tti ttm ttn ttr tts ttt ttu tub tui tum tun tur tus tut tuu ubb ubi ubn ubr ubs ubt ubu uib uii uim uin uir uis uit uiu um- umb umi umm umn umr ums umt umu un- unb uni unm unn unr uns unt unu ur- urb uri urm urn urr urs urt uru usb usi usm usn usr uss ust usu utb uti utm utn utr uts utt utu uum uun uur uus uut uuu