-er -ic bbb bbc bbe bbg bbh bbi bbn bbr bcb bcc bce bcg bch bci bcn bcr be- beb bec bee beg beh bei ben ber bgb bgc bge bgg bgh bgi bgn bgr bhb bhc bhe bhg bhh bhi bhr bi- bib bic bie big bih bii bin bir bnb bnc bne bng bni bnn bnr brb bre brg brh bri brn brr c-- cbb cbc cbe cbg cbh cbi cbn cbr ccb ccc cce ccg cch cci ccn ccr ce- ceb cec cee ceg ceh cei cen cer cgb cgc cge cgg cgh cgi cgn cgr ch- chb chc che chg chh chi chn chr ci- cib cic cie cig cih cii cin cir cn- cnb cnc cne cng cnh cni cnn cnr crb crc cre crg crh cri crn crr ebb ebc ebe ebg ebh ebi ebn ebr ec- ecb ecc ece ecg ech eci ecn ecr eeb eec eee eeg een eer egb egc ege egg egh egi egn egr ehb ehc ehe ehg ehh ehi ehn ehr eib eic eie eig eii ein eir en- enb enc ene eng enh eni enn enr erb erc ere erg erh eri ern err gbc gbe gbg gbh gbi gbn gbr gcb gcc gce gcg gch gci gcn gcr ge- geb gec gee geg geh gei gen ger ggb ggc ggg ggh ggi ggn ggr ghb ghc ghe ghg ghh ghi ghn ghr gib gic gie gig gih gii gin gir gnb gnc gne gni gnn gnr grb grc gre grg grh gri grn grr h-i hbb hbc hbe hbg hbh hbi hbn hbr hcb hcc hce hcg hch hci hcn hcr he- heb hec hee heg heh hei hen her hgb hgc hge hgg hgh hgi hgn hgr hhb hhc hhe hhg hhh hhi hhn hhr hib hic hie hig hih hii hin hir hnb hnc hne hng hnh hnn hr- hrb hrc hre hrg hrh hri hrn hrr ibb ibc ibe ibg ibh ibi ibn ibr icb icc ice icg ich ici icn icr ie- iec iee ieg iei ien ier igb igc ige igg igh igi ign igr ihb ihc ihe ihg ihh ihi ihn ihr iib iic iie iih iii iin iir in- inb inc ine ing inh ini inn inr ir- irb irc ire irg iri irn irr n-i nbb nbc nbe nbg nbi nbn nbr ncb ncc nce ncg nch nci ncn ncr ne- neb nec nee neg neh nei nen ner ngb ngc nge ngg ngh ngi ngn nhb nhc nhe nhg nhh nhi nhn nhr nib nic nie nig nih nii nin nir nnb nnc nne nng nnh nni nnn nrb nrc nre nrg nri nrn nrr rbb rbc rbe rbg rbh rbi rbn rbr rcb rcc rce rcg rch rci rcn rcr re- reb rec ree reg reh rei ren rer rgb rgc rge rgg rgh rgi rgn rgr rh- rhb rhc rhe rhg rhh rhi rhn rhr rib ric rie rig rih rii rin rir rnb rnc rng rnh rni rnn rnr rrb rrc rrg rrh rri rrn rrr