b-u bbb bbf bbh bbi bbr bbs bbu bfb bff bfh bfi bfr bfs bfu bhb bhf bhh bhi bhr bhs bhu bi- bib bif bih bii bir bis biu brb brf brh bri brr brs bru bsb bsf bsh bsi bsr bss bsu bub buf buh bui bur bus buu fbb fbf fbh fbi fbr fbs fbu fff ffh ffi ffr ffs ffu fhb fhf fhh fhi fhr fhs fib fif fih fii fir fis fiu frb frf frh fri frr frs fru fsb fsf fsh fsi fsr fss fsu fub fuf fui fur fus fuu h-i hbb hbf hbh hbi hbr hbs hbu hfb hff hfh hfi hfr hfs hfu hhb hhf hhh hhi hhr hhs hhu hib hif hih hii hir his hiu hr- hrb hrf hrh hri hrr hrs hru hsb hsf hsh hsi hsr hss hsu hub huf huh hui hur hus huu i-f ibb ibf ibh ibi ibr ibs ibu ifb iff ifi ifr ifs ifu ihb ihf ihh ihi ihr ihs ihu iib iif iih iii iir iis iiu ir- irb irf iri irr irs iru is- isb isf ish isi isr iss isu iu- iub iui iur ius rbb rbf rbh rbi rbr rbs rbu rfb rff rfh rfi rfr rfs rfu rh- rhb rhf rhh rhi rhr rhs rhu rib rif rih rii rir ris rrb rrf rrh rri rrr rrs rru rsb rsf rsh rsi rsr rss rsu rub ruf ruh rui rur rus ruu sbb sbf sbh sbi sbr sbs sbu sfb sff sfh sfi sfr sfs sfu sh- shb shf shh shi shr shs shu sib sif sih sii sir sis siu sr- srb srf srh sri srr srs ss- ssb ssf ssh ssi ssr sss ssu sub suf suh sui sur sus suu ubb ubf ubh ubi ubr ubs ubu uff ufh ufi ufr ufs ufu uhb uhf uhh uhi uhr uhs uhu uib uif uii uir uis uiu ur- urb urf uri urr urs uru usb usf ush usi usr uss usu uur uus uuu