bbb bbc bbg bbr bbt bcb bcc bcg bcr bct bcz bgb bgc bgg bgr bgt bgz brb brg brr brt brz btb btc btg btr btt btz bzr bzz c-- cbb cbc cbg cbr cbt cbz ccb ccc ccg ccr cct ccz cgb cgc cgg cgr cgt crb crc crg crr crt crz ctb ctc ctg ctr ctt ctz cz- czc czt gbc gbg gbr gbt gbz gcb gcc gcg gcr gct ggb ggc ggg ggr ggt ggz grb grc grg grr grt gtb gtc gtg gtr gtt gzr rbb rbc rbg rbr rbt rcb rcc rcg rcr rct rgb rgc rgg rgr rgt rrb rrc rrg rrr rrt rtb rtc rtg rtr rtt rtz rzb tbb tbc tbg tbr tbt tbz tcb tcc tcg tcr tct tgb tgc tgg tgr tgt tgz trb trc trg trr trt trz ttb ttc ttg ttr ttt z-g zbb zbc zbr zbt zgb zgg ztr zzr zzt zzz