-ey -ic bbb bbc bbe bbi bbk bby bcb bcc bce bci bck bcy be- beb bec bee bei bek bey bi- bib bic bie bii bik biy bkb bkc bke bkk by- byc bye byi byk c-- cbb cbc cbe cbi cbk cby ccb ccc cce cci cck ce- ceb cec cee cei cek cey ci- cib cic cie cii cik ckb ckc cki cky cyb cyc cye cyk ebb ebc ebe ebi ebk eby ec- ecb ecc ece eci eck eeb eec eee eek eey eib eic eie eii eik ekb ekc eke eki eky eyc eye ibb ibc ibe ibi ibk iby icb icc ice ici ick icy ie- iec iee iei iek iey iib iic iie iii ikb ikc ike iki ikk iyc iye iyy kbb kbc kbe kbi kbk kcb kcc kce kci kck ke- keb kec kee kei kek key kib kic kie kii kik kkb kkc kke kki kkk kky kyc kye ybc ybe ybi yby ycc yce yci ycy yeb yec yee yei yek yey yie yii yki ykk yyb yyc yye yyy