-er -ic bbb bbc bbe bbh bbi bbr bcb bcc bce bch bci bcr be- beb bec bee beh bei ber bhb bhc bhe bhh bhi bhr bi- bib bic bie bih bii bir brb bre brh bri brr c-- cbb cbc cbe cbh cbi cbr ccb ccc cce cch cci ccr ce- ceb cec cee ceh cei cer ch- chb chc che chh chi chr ci- cib cic cie cih cii cir crb crc cre crh cri crr ebb ebc ebe ebh ebi ebr ec- ecb ecc ece ech eci ecr eeb eec eee eer ehb ehc ehe ehh ehi ehr eib eic eie eii eir erb erc ere erh eri err h-i hbb hbc hbe hbh hbi hbr hcb hcc hce hch hci hcr he- heb hec hee heh hei her hhb hhc hhe hhh hhi hhr hib hic hie hih hii hir hr- hrb hrc hre hrh hri hrr ibb ibc ibe ibh ibi ibr icb icc ice ich ici icr ie- iec iee iei ier ihb ihc ihe ihh ihi ihr iib iic iie iih iii iir ir- irb irc ire iri irr rbb rbc rbe rbh rbi rbr rcb rcc rce rch rci rcr re- reb rec ree reh rei rer rh- rhb rhc rhe rhh rhi rhr rib ric rie rih rii rir rrb rrc rrh rri rrr