bbb bbc bbg bbn bbr bbs bbt bcb bcc bcg bcn bcr bcs bct bgb bgc bgg bgn bgr bgs bgt bnb bnc bng bnn bnr bns bnt brb brg brn brr brs brt bsb bsc bsg bsn bsr bss bst btb btc btg btn btr bts btt c-- cbb cbc cbg cbn cbr cbs cbt ccb ccc ccg ccn ccr ccs cct cgb cgc cgg cgn cgr cgs cgt cn- cnb cnc cng cnn cnr cns cnt crb crc crg crn crr crs crt csb csc csg csn csr css cst ctb ctc ctg ctn ctr cts ctt gbc gbg gbn gbr gbs gbt gcb gcc gcg gcn gcr gcs gct ggb ggc ggg ggn ggr ggs ggt gnb gnc gnn gnr gns gnt grb grc grg grn grr grs grt gsb gsc gsg gsn gsr gss gst gtb gtc gtg gtn gtr gts gtt nbb nbc nbg nbn nbr nbs nbt ncb ncc ncg ncn ncr ncs nct ngb ngc ngg ngn ngs ngt nnb nnc nng nnn nns nnt nrb nrc nrg nrn nrr nrs nrt nsb nsc nsg nsn nsr nss nst ntb ntc ntg ntn ntr nts ntt rbb rbc rbg rbn rbr rbs rbt rcb rcc rcg rcn rcr rcs rct rgb rgc rgg rgn rgr rgs rgt rnb rnc rng rnn rnr rns rnt rrb rrc rrg rrn rrr rrs rrt rsb rsc rsg rsn rsr rss rst rtb rtc rtg rtn rtr rts rtt sbb sbc sbg sbn sbr sbs sbt scb scc scg scn scr scs sct sgb sgc sgg sgn sgr sgs sgt snb snc sng snn snr sns snt sr- srb src srg srn srr srs srt ss- ssb ssc ssg ssn ssr sss sst stb stc stg stn str sts stt tbb tbc tbg tbn tbr tbs tbt tcb tcc tcg tcn tcr tcs tct tgb tgc tgg tgn tgr tgs tgt tnb tnc tng tnn tnr tns tnt trb trc trg trn trr trs trt tsb tsc tsg tsn tsr tss tst ttb ttc ttg ttn ttr tts ttt