-ic bbb bbc bbe bbi bbn bcb bcc bce bci bcn bcz be- beb bec bee bei ben bez bi- bib bic bie bii bin biz bnb bnc bne bni bnn bnz bze bzn bzz c-- cbb cbc cbe cbi cbn cbz ccb ccc cce cci ccn ccz ce- ceb cec cee cei cen cez ci- cib cic cie cii cin cn- cnb cnc cne cni cnn cz- czc cze ebb ebc ebe ebi ebn ec- ecb ecc ece eci ecn eeb eec eee een eib eic eie eii ein en- enb enc ene eni enn enz eze ezz ibb ibc ibe ibi ibn ibz icb icc ice ici icn icz ie- iec iee iei ien iib iic iie iii iin in- inb inc ine ini inn ize izi izz n-i nbb nbc nbe nbi nbn ncb ncc nce nci ncn ne- neb nec nee nei nen nez nib nic nie nii nin niz nnb nnc nne nni nnn nnz nzb nze nzi nzz zbb zbc zce zeb zec zee zen zez zib zie zin ziz znc zne znn zzz