b-u bbb bbf bbg bbi bbn bbr bbt bbu bfb bff bfg bfi bfn bfr bft bfu bgb bgf bgg bgi bgn bgr bgt bgu bi- bib bif big bii bin bir bit biu bnb bnf bng bni bnn bnr bnt bnu brb brf brg bri brn brr brt bru btb btf btg bti btn btr btt btu bub buf bug bui bun bur but buu fbb fbf fbg fbi fbn fbr fbt fbu fff ffg ffi ffn ffr fft ffu fgb fgf fgg fgi fgn fgr fgt fib fif fig fii fin fir fit fiu fnb fnf fng fni fnn fnr fnt fnu frb frf frg fri frn frr frt fru ftb ftf ftg fti ftn ftr ftt ftu fub fuf fug fui fun fur fut fuu gbf gbg gbi gbn gbr gbt gbu gfb gff gfi gfr gft ggb ggg ggi ggn ggr ggt ggu gib gif gig gii gin gir git giu gnb gnf gni gnn gnr gnt gnu grb grf grg gri grn grr grt gru gtb gtf gtg gti gtn gtr gtt gtu gu- gub guf gug gui gun gur gut guu i-f ibb ibf ibg ibi ibn ibr ibt ibu ifb iff ifg ifi ifn ifr ift ifu igb igf igg igi ign igr igt igu iib iif iii iin iir iit iiu in- inb inf ing ini inn inr int inu ir- irb irf irg iri irn irr irt iru itb itf itg iti itn itt itu iu- iub iug iui iur iut n-i nbb nbf nbg nbi nbn nbr nbt nbu nfb nff nfi nfn nfr nft nfu ngb ngf ngg ngi ngn ngt ngu nib nif nig nii nin nir nit niu nnb nnf nng nni nnn nnt nnu nrb nrf nrg nri nrn nrr nrt nru ntb ntf ntg nti ntn ntr ntt ntu nub nug nui nun nur nut nuu rbb rbf rbg rbi rbn rbr rbt rbu rfb rff rfg rfi rfn rfr rft rfu rgb rgf rgg rgi rgn rgr rgt rib rif rig rii rin rir rit rnb rng rni rnn rnr rnt rnu rrb rrf rrg rri rrn rrr rrt rru rtb rtf rtg rti rtn rtr rtt rtu rub ruf rug rui run rur rut ruu tbb tbf tbg tbi tbn tbr tbt tbu tfb tff tfg tfi tfn tfr tft tfu tgb tgf tgg tgi tgn tgr tgt tgu tib tif tig tii tin tir tit tiu tnb tnf tng tni tnn tnr tnt trb trf trg tri trn trr trt tru ttb ttf ttg tti ttn ttr ttt ttu tub tuf tug tui tun tur tut tuu ubb ubf ubg ubi ubn ubr ubt ubu uff ufg ufi ufn ufr uft ufu ugb ugf ugg ugi ugn ugr ugt ugu uib uif uig uii uin uir uit uiu un- unb unf ung uni unn unr unt unu ur- urb urf urg uri urn urr urt uru utb utf uti utn utr utt utu uug uun uur uut uuu