-er -ic bbb bbc bbe bbh bbi bbm bbr bcb bcc bce bch bci bcm bcr be- beb bec bee beh bei bem ber bhb bhc bhe bhh bhi bhm bhr bi- bib bic bie bih bii bim bir bmb bmc bme bmh bmi bmm bmr brb bre brh bri brm brr c-- cbb cbc cbe cbh cbi cbm cbr ccb ccc cce cch cci ccm ccr ce- ceb cec cee ceh cei cem cer ch- chb chc che chh chi chm chr ci- cib cic cie cih cii cim cir cmb cmc cme cmh cmi cmm cmr crb crc cre crh cri crm crr ebb ebc ebe ebh ebi ebm ebr ec- ecb ecc ece ech eci ecm ecr eeb eec eee eem eer ehb ehc ehe ehh ehi ehm ehr eib eic eie eii eim eir em- emb emc eme emh emi emm emr erb erc ere erh eri erm err h-i hbb hbc hbe hbh hbi hbm hbr hcb hcc hce hch hci hcm hcr he- heb hec hee heh hei hem her hhb hhc hhe hhh hhi hhm hhr hib hic hie hih hii him hir hmb hmc hme hmh hmi hmm hmr hr- hrb hrc hre hrh hri hrm hrr ibb ibc ibe ibh ibi ibm ibr icb icc ice ich ici icm icr ie- iec iee iei iem ier ihb ihc ihe ihh ihi ihm ihr iib iic iie iih iii iim iir im- imb imc ime imh imi imm ir- irb irc ire iri irm irr m-r mbb mbc mbe mbh mbi mbm mbr mc- mcb mcc mce mch mci mcm mcr meb mec mee meh mei mem mer mhc mhh mhi mhm mhr mi- mib mic mie mih mii mim mir mmb mmc mme mmh mmi mmm mmr mrb mrc mre mrh mri mrm mrr rbb rbc rbe rbh rbi rbm rbr rcb rcc rce rch rci rcm rcr re- reb rec ree reh rei rem rer rh- rhb rhc rhe rhh rhi rhm rhr rib ric rie rih rii rim rir rmb rmc rme rmh rmi rmm rmr rrb rrc rrh rri rrm rrr