-er -ic bbb bbc bbe bbg bbh bbi bbr bcb bcc bce bcg bch bci bcr be- beb bec bee beg beh bei ber bgb bgc bge bgg bgh bgi bgr bhb bhc bhe bhg bhh bhi bhr bi- bib bic bie big bih bii bir brb bre brg brh bri brr c-- cbb cbc cbe cbg cbh cbi cbr ccb ccc cce ccg cch cci ccr ce- ceb cec cee ceg ceh cei cer cgb cgc cge cgg cgh cgi cgr ch- chb chc che chg chh chi chr ci- cib cic cie cig cih cii cir crb crc cre crg crh cri crr ebb ebc ebe ebg ebh ebi ebr ec- ecb ecc ece ecg ech eci ecr eeb eec eee eeg eer egb egc ege egg egh egi egr ehb ehc ehe ehg ehh ehi ehr eib eic eie eig eii eir erb erc ere erg erh eri err gbc gbe gbg gbh gbi gbr gcb gcc gce gcg gch gci gcr ge- geb gec gee geg geh gei ger ggb ggc ggg ggh ggi ggr ghb ghc ghe ghg ghh ghi ghr gib gic gie gig gih gii gir grb grc gre grg grh gri grr h-i hbb hbc hbe hbg hbh hbi hbr hcb hcc hce hcg hch hci hcr he- heb hec hee heg heh hei her hgb hgc hge hgg hgh hgi hgr hhb hhc hhe hhg hhh hhi hhr hib hic hie hig hih hii hir hr- hrb hrc hre hrg hrh hri hrr ibb ibc ibe ibg ibh ibi ibr icb icc ice icg ich ici icr ie- iec iee ieg iei ier igb igc ige igg igh igi igr ihb ihc ihe ihg ihh ihi ihr iib iic iie iih iii iir ir- irb irc ire irg iri irr rbb rbc rbe rbg rbh rbi rbr rcb rcc rce rcg rch rci rcr re- reb rec ree reg reh rei rer rgb rgc rge rgg rgh rgi rgr rh- rhb rhc rhe rhg rhh rhi rhr rib ric rie rig rih rii rir rrb rrc rrg rrh rri rrr