-ic bbb bbc bbg bbi bbt bby bcb bcc bcg bci bct bcy bgb bgc bgg bgi bgt bi- bib bic big bii bit biy btb btc btg bti btt bty by- byc byg byi byt c-- cbb cbc cbg cbi cbt cby ccb ccc ccg cci cct cgb cgc cgg cgi cgt cgy ci- cib cic cig cii cit ctb ctc ctg cti ctt cty cyb cyc cyg cyt gbc gbg gbi gbt gby gcb gcc gcg gci gct ggb ggc ggg ggi ggt gib gic gig gii git giy gtb gtc gtg gti gtt gty gy- gyb ibb ibc ibg ibi ibt iby icb icc icg ici ict icy igb igc igg igi igt igy iib iic iii iit itb itc itg iti itt ity iyc iyt iyy tbb tbc tbg tbi tbt tcb tcc tcg tci tct tgb tgc tgg tgi tgt tgy tib tic tig tii tit tiy ttb ttc ttg tti ttt tty tyc tyg tyt ybc ybg ybi yby ycc yci ycy ygc yig yii yit ytc ytt yyb yyc yyg yyt yyy