bbb bbc bbg bbn bbo bbt bcb bcc bcg bcn bco bct bgb bgc bgg bgn bgo bgt bnb bnc bng bnn bno bnt bob boc bog bon boo bot btb btc btg btn bto btt c-- cbb cbc cbg cbn cbo cbt ccb ccc ccg ccn cco cct cgb cgc cgg cgn cgo cgt cn- cnb cnc cng cnn cno cnt co- cob coc cog con coo cot ctb ctc ctg ctn cto ctt gbc gbg gbn gbo gbt gcb gcc gcg gcn gco gct ggb ggc ggg ggn ggo ggt gnb gnc gnn gno gnt gob goc gog gon goo got gtb gtc gtg gtn gto gtt nbb nbc nbg nbn nbo nbt ncb ncc ncg ncn nco nct ngb ngc ngg ngn ngo ngt nnb nnc nng nnn nno nnt no- nob noc nog non noo not ntb ntc ntg ntn nto ntt ob- obb obc obg obn obo obt oc- ocb occ ocg ocn oco oct ogc ogg ogn ogo ogt on- onb onc ong onn ono ont oo- oob ooc oog oon ooo oot ot- otb otc otg otn oto ott tbb tbc tbg tbn tbo tbt tcb tcc tcg tcn tco tct tgb tgc tgg tgn tgo tgt tnb tnc tng tnn tno tnt to- tob toc tog ton too tot ttb ttc ttg ttn tto ttt