-ic bbb bbc bbe bbi bbo bbt bcb bcc bce bci bco bct bcz be- beb bec bee bei beo bet bez bi- bib bic bie bii bio bit biz bob boc boe boi boo bot boz btb btc bte bti bto btt btz bze bzo bzz c-- cbb cbc cbe cbi cbo cbt cbz ccb ccc cce cci cco cct ccz ce- ceb cec cee cei ceo cet cez ci- cib cic cie cii cio cit co- cob coc coe coi coo cot coz ctb ctc cte cti cto ctt ctz cz- czc cze czo czt ebb ebc ebe ebi ebo ebt ec- ecb ecc ece eci eco ect eeb eec eee eeo eet eib eic eie eii eio eit eo- eob eoc eoe eoi eoo eot etb etc ete eti eto ett etz eze ezo ezz ibb ibc ibe ibi ibo ibt ibz icb icc ice ici ico ict icz ie- iec iee iei iet iib iic iie iii iio iit io- iob ioc ioe ioi ioo iot itb itc ite iti ito itt itz ize izi izo izz o-i ob- obb obc obe obi obo obt oc- ocb occ oci oco oct ocz oeb oec oee oei oeo oet oib oic oie oii oio oit oiz oo- oob ooc ooi ooo oot ot- otb otc ote oti oto ott otz oze ozo ozt ozz tbb tbc tbe tbi tbo tbt tbz tcb tcc tce tci tco tct te- teb tec tee tei teo tet tez tib tic tie tii tio tit tiz to- tob toc toe toi too tot toz ttb ttc tte tti tto ttt tze zbb zbc zbt zce zco zeb zec zee zeo zet zez zib zie zio zit ziz zo- zob zoc zoe zoi zoo zot zte zzt zzz