-er bbb bbc bbe bbr bcb bcc bce bcj bcr bcz be- beb bec bee ber bez bjc bjj bjr brb bre brj brr brz bze bzr bzz c-- c-j cbb cbc cbe cbj cbr cbz ccb ccc cce ccj ccr ccz ce- ceb cec cee cej cer cez cjb cjc cjr crb crc cre crj crr crz cz- czc cze czj ebb ebc ebe ebj ebr ec- ecb ecc ece ecj ecr eeb eec eee eer ejc erb erc ere err erz eze ezr ezz j-z jbc jbj jbr jbz jcb jcc jce jcr jeb jec jee jej jer jez jjb jjc jjj jjr jrb jrc jrr jrz rbb rbc rbe rbr rcb rcc rce rcj rcr re- reb rec ree rer rez rjc rjr rrb rrc rrr rzb rze zbb zbc zbr zce zeb zec zee zer zez zje zzr zzz