-er -ic bbb bbc bbe bbg bbi bbn bbr bcb bcc bce bcg bci bcn bcr be- beb bec bee beg bei ben ber bgb bgc bge bgg bgi bgn bgr bi- bib bic bie big bii bin bir bnb bnc bne bng bni bnn bnr brb bre brg bri brn brr c-- cbb cbc cbe cbg cbi cbn cbr ccb ccc cce ccg cci ccn ccr ce- ceb cec cee ceg cei cen cer cgb cgc cge cgg cgi cgn cgr ci- cib cic cie cig cii cin cir cn- cnb cnc cne cng cni cnn cnr crb crc cre crg cri crn crr ebb ebc ebe ebg ebi ebn ebr ec- ecb ecc ece ecg eci ecn ecr eeb eec eee eeg een eer egb egc ege egg egi egn egr eib eic eie eig eii ein eir en- enb enc ene eng eni enn enr erb erc ere erg eri ern err gbc gbe gbg gbi gbn gbr gcb gcc gce gcg gci gcn gcr ge- geb gec gee geg gei gen ger ggb ggc ggg ggi ggn ggr gib gic gie gig gii gin gir gnb gnc gne gni gnn gnr grb grc gre grg gri grn grr ibb ibc ibe ibg ibi ibn ibr icb icc ice icg ici icn icr ie- iec iee ieg iei ien ier igb igc ige igg igi ign igr iib iic iie iii iin iir in- inb inc ine ing ini inn inr ir- irb irc ire irg iri irn irr n-i nbb nbc nbe nbg nbi nbn nbr ncb ncc nce ncg nci ncn ncr ne- neb nec nee neg nei nen ner ngb ngc nge ngg ngi ngn nib nic nie nig nii nin nir nnb nnc nne nng nni nnn nrb nrc nre nrg nri nrn nrr rbb rbc rbe rbg rbi rbn rbr rcb rcc rce rcg rci rcn rcr re- reb rec ree reg rei ren rer rgb rgc rge rgg rgi rgn rgr rib ric rie rig rii rin rir rnb rnc rng rni rnn rnr rrb rrc rrg rri rrn rrr