-er -ey -ic bbb bbc bbe bbi bbr bby bcb bcc bce bci bcr bcy be- beb bec bee bei ber bey bi- bib bic bie bii bir biy brb bre bri brr bry by- byc bye byi byr c-- cbb cbc cbe cbi cbr cby ccb ccc cce cci ccr ce- ceb cec cee cei cer cey ci- cib cic cie cii cir crb crc cre cri crr cry cyb cyc cye cyr ebb ebc ebe ebi ebr eby ec- ecb ecc ece eci ecr eeb eec eee eer eey eib eic eie eii eir erb erc ere eri err ery eyc eye eyr ibb ibc ibe ibi ibr iby icb icc ice ici icr icy ie- iec iee iei ier iey iib iic iie iii iir ir- irb irc ire iri irr iry iyc iye iyr iyy rbb rbc rbe rbi rbr rcb rcc rce rci rcr re- reb rec ree rei rer rey rib ric rie rii rir riy rrb rrc rri rrr ry- ryc rye ryr ryy ybc ybe ybi ybr yby ycc yce yci ycy yeb yec yee yei yer yey yie yii yir yrc yre yyb yyc yye yyy