-er -ic bbb bbc bbe bbi bbr bcb bcc bce bci bcr bcz be- beb bec bee bei ber bez bi- bib bic bie bii bir biz brb bre bri brr brz bze bzr bzz c-- cbb cbc cbe cbi cbr cbz ccb ccc cce cci ccr ccz ce- ceb cec cee cei cer cez ci- cib cic cie cii cir crb crc cre cri crr crz cz- czc cze ebb ebc ebe ebi ebr ec- ecb ecc ece eci ecr eeb eec eee eer eib eic eie eii eir erb erc ere eri err erz eze ezr ezz ibb ibc ibe ibi ibr ibz icb icc ice ici icr icz ie- iec iee iei ier iib iic iie iii iir ir- irb irc ire iri irr ize izi izz rbb rbc rbe rbi rbr rcb rcc rce rci rcr re- reb rec ree rei rer rez rib ric rie rii rir riz rrb rrc rri rrr rzb rze zbb zbc zbr zce zeb zec zee zer zez zib zie zir ziz zzr zzz