-er -ic bbb bbc bbe bbg bbi bbn bbr bbt bcb bcc bce bcg bci bcn bcr bct be- beb bec bee beg bei ben ber bet bgb bgc bge bgg bgi bgn bgr bgt bi- bib bic bie big bii bin bir bit bnb bnc bne bng bni bnn bnr bnt brb bre brg bri brn brr brt btb btc bte btg bti btn btr btt c-- cbb cbc cbe cbg cbi cbn cbr cbt ccb ccc cce ccg cci ccn ccr cct ce- ceb cec cee ceg cei cen cer cet cgb cgc cge cgg cgi cgn cgr cgt ci- cib cic cie cig cii cin cir cit cn- cnb cnc cne cng cni cnn cnr cnt crb crc cre crg cri crn crr crt ctb ctc cte ctg cti ctn ctr ctt ebb ebc ebe ebg ebi ebn ebr ebt ec- ecb ecc ece ecg eci ecn ecr ect eeb eec eee eeg een eer eet egb egc ege egg egi egn egr egt eib eic eie eig eii ein eir eit en- enb enc ene eng eni enn enr ent erb erc ere erg eri ern err ert etb etc ete etg eti etn etr ett gbc gbe gbg gbi gbn gbr gbt gcb gcc gce gcg gci gcn gcr gct ge- geb gec gee geg gei gen ger get ggb ggc ggg ggi ggn ggr ggt gib gic gie gig gii gin gir git gnb gnc gne gni gnn gnr gnt grb grc gre grg gri grn grr grt gtb gtc gte gtg gti gtn gtr gtt ibb ibc ibe ibg ibi ibn ibr ibt icb icc ice icg ici icn icr ict ie- iec iee ieg iei ien ier iet igb igc ige igg igi ign igr igt iib iic iie iii iin iir iit in- inb inc ine ing ini inn inr int ir- irb irc ire irg iri irn irr irt itb itc ite itg iti itn itt n-i nbb nbc nbe nbg nbi nbn nbr nbt ncb ncc nce ncg nci ncn ncr nct ne- neb nec nee neg nei nen ner net ngb ngc nge ngg ngi ngn ngt nib nic nie nig nii nin nir nit nnb nnc nne nng nni nnn nnt nrb nrc nre nrg nri nrn nrr nrt ntb ntc nte ntg nti ntn ntr ntt rbb rbc rbe rbg rbi rbn rbr rbt rcb rcc rce rcg rci rcn rcr rct re- reb rec ree reg rei ren rer ret rgb rgc rge rgg rgi rgn rgr rgt rib ric rie rig rii rin rir rit rnb rnc rng rni rnn rnr rnt rrb rrc rrg rri rrn rrr rrt rtb rtc rte rtg rti rtn rtr rtt tbb tbc tbe tbg tbi tbn tbr tbt tcb tcc tce tcg tci tcn tcr tct te- teb tec tee teg tei ten ter tet tgb tgc tge tgg tgi tgn tgr tgt tib tic tie tig tii tin tir tit tnb tnc tne tng tni tnn tnr tnt trb trc tre trg tri trn trr trt ttb ttc tte ttg tti ttn ttr ttt