-ic bbb bbc bbi bbl bbt bcb bcc bci bcl bct bi- bib bic bii bil bit blb blc bli bll blt btb btc bti btl btt c-- cbb cbc cbi cbl cbt ccb ccc cci ccl cct ci- cib cic cii cil cit cl- clb clc cli cll clt ctb ctc cti ctl ctt ibb ibc ibi ibl ibt icb icc ici icl ict iib iic iii iil iit il- ilb ilc ili ill ilt itb itc iti itl itt lbb lbc lbi lbl lbt lcb lcc lci lcl lct lib lic lii lil lit llb llc lli lll llt ltb ltc lti ltl ltt tbb tbc tbi tbl tbt tcb tcc tci tcl tct tib tic tii til tit tlc tli tll tlt ttb ttc tti ttl ttt