-er -ic bbb bbc bbe bbh bbi bbr bbs bcb bcc bce bch bci bcr bcs be- beb bec bee beh bei ber bes bhb bhc bhe bhh bhi bhr bhs bi- bib bic bie bih bii bir bis brb bre brh bri brr brs bsb bsc bse bsh bsi bsr bss c-- cbb cbc cbe cbh cbi cbr cbs ccb ccc cce cch cci ccr ccs ce- ceb cec cee ceh cei cer ces ch- chb chc che chh chi chr chs ci- cib cic cie cih cii cir cis crb crc cre crh cri crr crs csb csc cse csh csi csr css ebb ebc ebe ebh ebi ebr ebs ec- ecb ecc ece ech eci ecr ecs eeb eec eee eer ees ehb ehc ehe ehh ehi ehr ehs eib eic eie eii eir eis erb erc ere erh eri err ers es- esb esc ese esh esi esr ess h-i hbb hbc hbe hbh hbi hbr hbs hcb hcc hce hch hci hcr hcs he- heb hec hee heh hei her hes hhb hhc hhe hhh hhi hhr hhs hib hic hie hih hii hir his hr- hrb hrc hre hrh hri hrr hrs hsb hsc hse hsh hsi hsr hss ibb ibc ibe ibh ibi ibr ibs icb icc ice ich ici icr ics ie- iec iee iei ier ies ihb ihc ihe ihh ihi ihr ihs iib iic iie iih iii iir iis ir- irb irc ire iri irr irs is- isb isc ise ish isi isr iss rbb rbc rbe rbh rbi rbr rbs rcb rcc rce rch rci rcr rcs re- reb rec ree reh rei rer res rh- rhb rhc rhe rhh rhi rhr rhs rib ric rie rih rii rir ris rrb rrc rrh rri rrr rrs rsb rsc rse rsh rsi rsr rss sbb sbc sbe sbh sbi sbr sbs scb scc sce sch sci scr scs se- seb sec see seh sei ser ses sh- shb shc she shh shi shr shs sib sic sie sih sii sir sis sr- srb src sre srh sri srr srs ss- ssb ssc sse ssh ssi ssr sss