-er -ic bbb bbc bbe bbi bbn bbr bbt bcb bcc bce bci bcn bcr bct be- beb bec bee bei ben ber bet bi- bib bic bie bii bin bir bit bnb bnc bne bni bnn bnr bnt brb bre bri brn brr brt btb btc bte bti btn btr btt c-- cbb cbc cbe cbi cbn cbr cbt ccb ccc cce cci ccn ccr cct ce- ceb cec cee cei cen cer cet ci- cib cic cie cii cin cir cit cn- cnb cnc cne cni cnn cnr cnt crb crc cre cri crn crr crt ctb ctc cte cti ctn ctr ctt ebb ebc ebe ebi ebn ebr ebt ec- ecb ecc ece eci ecn ecr ect eeb eec eee een eer eet eib eic eie eii ein eir eit en- enb enc ene eni enn enr ent erb erc ere eri ern err ert etb etc ete eti etn etr ett ibb ibc ibe ibi ibn ibr ibt icb icc ice ici icn icr ict ie- iec iee iei ien ier iet iib iic iie iii iin iir iit in- inb inc ine ini inn inr int ir- irb irc ire iri irn irr irt itb itc ite iti itn itt n-i nbb nbc nbe nbi nbn nbr nbt ncb ncc nce nci ncn ncr nct ne- neb nec nee nei nen ner net nib nic nie nii nin nir nit nnb nnc nne nni nnn nnt nrb nrc nre nri nrn nrr nrt ntb ntc nte nti ntn ntr ntt rbb rbc rbe rbi rbn rbr rbt rcb rcc rce rci rcn rcr rct re- reb rec ree rei ren rer ret rib ric rie rii rin rir rit rnb rnc rni rnn rnr rnt rrb rrc rri rrn rrr rrt rtb rtc rte rti rtn rtr rtt tbb tbc tbe tbi tbn tbr tbt tcb tcc tce tci tcn tcr tct te- teb tec tee tei ten ter tet tib tic tie tii tin tir tit tnb tnc tne tni tnn tnr tnt trb trc tre tri trn trr trt ttb ttc tte tti ttn ttr ttt