-er -ic -ji bbb bbc bbe bbi bbr bbt bcb bcc bce bci bcj bcr bct be- beb bec bee bei ber bet bi- bib bic bie bii bij bir bit bjc bji bjj bjr bjt brb bre bri brj brr brt btb btc bte bti btr btt c-- c-j cbb cbc cbe cbi cbj cbr cbt ccb ccc cce cci ccj ccr cct ce- ceb cec cee cei cej cer cet ci- cib cic cie cii cij cir cit cjb cjc cjr crb crc cre cri crj crr crt ctb ctc cte cti ctr ctt ebb ebc ebe ebi ebj ebr ebt ec- ecb ecc ece eci ecj ecr ect eeb eec eee eer eet eib eic eie eii eij eir eit ejc eji ejt erb erc ere eri err ert etb etc ete eti etj etr ett ibb ibc ibe ibi ibj ibr ibt icb icc ice ici icj icr ict ie- iec iee iei iej ier iet iib iic iie iii iij iir iit ijb ijc ije iji ijt ir- irb irc ire iri irj irr irt itb itc ite iti itj itt j-i jbc jbi jbj jbr jbt jcb jcc jce jci jcr jct jeb jec jee jei jej jer jet jib jic jie jii jij jir jit jjb jjc jjj jjr jrb jrc jri jrr jrt jtb jtc jte jti jtr jtt rbb rbc rbe rbi rbr rbt rcb rcc rce rci rcj rcr rct re- reb rec ree rei rer ret rib ric rie rii rir rit rjc rjr rrb rrc rri rrr rrt rtb rtc rte rti rtj rtr rtt tbb tbc tbe tbi tbj tbr tbt tcb tcc tce tci tcj tcr tct te- teb tec tee tei tej ter tet tib tic tie tii tir tit tjc tje tji tjr trb trc tre tri trr trt ttb ttc tte tti ttr ttt