bbb bbg bbn bbr bbs bbt bgb bgg bgn bgr bgs bgt bnb bng bnn bnr bns bnt brb brg brn brr brs brt bsb bsg bsn bsr bss bst btb btg btn btr bts btt gbg gbn gbr gbs gbt ggb ggg ggn ggr ggs ggt gnb gnn gnr gns gnt grb grg grn grr grs grt gsb gsg gsn gsr gss gst gtb gtg gtn gtr gts gtt nbb nbg nbn nbr nbs nbt ngb ngg ngn ngs ngt nnb nng nnn nns nnt nrb nrg nrn nrr nrs nrt nsb nsg nsn nsr nss nst ntb ntg ntn ntr nts ntt rbb rbg rbn rbr rbs rbt rgb rgg rgn rgr rgs rgt rnb rng rnn rnr rns rnt rrb rrg rrn rrr rrs rrt rsb rsg rsn rsr rss rst rtb rtg rtn rtr rts rtt sbb sbg sbn sbr sbs sbt sgb sgg sgn sgr sgs sgt snb sng snn snr sns snt sr- srb srg srn srr srs srt ss- ssb ssg ssn ssr sss sst stb stg stn str sts stt tbb tbg tbn tbr tbs tbt tgb tgg tgn tgr tgs tgt tnb tng tnn tnr tns tnt trb trg trn trr trs trt tsb tsg tsn tsr tss tst ttb ttg ttn ttr tts ttt