-er -ic b-u bbb bbc bbe bbh bbi bbr bbs bbu bcb bcc bce bch bci bcr bcs bcu be- beb bec bee beh bei ber bes beu bhb bhc bhe bhh bhi bhr bhs bhu bi- bib bic bie bih bii bir bis biu brb bre brh bri brr brs bru bsb bsc bse bsh bsi bsr bss bsu bub buc bue buh bui bur bus buu c-- cbb cbc cbe cbh cbi cbr cbs cbu ccb ccc cce cch cci ccr ccs ccu ce- ceb cec cee ceh cei cer ces ceu ch- chb chc che chh chi chr chs chu ci- cib cic cie cih cii cir cis ciu crb crc cre crh cri crr crs cru csb csc cse csh csi csr css csu cub cuc cue cuh cui cur cus cuu ebb ebc ebe ebh ebi ebr ebs ebu ec- ecb ecc ece ech eci ecr ecs ecu eeb eec eee eer ees ehb ehc ehe ehh ehi ehr ehs ehu eib eic eie eii eir eis eiu erb erc ere erh eri err ers eru es- esb esc ese esh esi esr ess esu eu- eub euc eue eui eur eus h-i hbb hbc hbe hbh hbi hbr hbs hbu hcb hcc hce hch hci hcr hcs he- heb hec hee heh hei her hes heu hhb hhc hhe hhh hhi hhr hhs hhu hib hic hie hih hii hir his hiu hr- hrb hrc hre hrh hri hrr hrs hru hsb hsc hse hsh hsi hsr hss hsu hub huc hue huh hui hur hus huu ibb ibc ibe ibh ibi ibr ibs ibu icb icc ice ich ici icr ics icu ie- iec iee iei ier ies ihb ihc ihe ihh ihi ihr ihs ihu iib iic iie iih iii iir iis iiu ir- irb irc ire iri irr irs iru is- isb isc ise ish isi isr iss isu iu- iub iuc iue iui iur ius rbb rbc rbe rbh rbi rbr rbs rbu rcb rcc rce rch rci rcr rcs rcu re- reb rec ree reh rei rer res reu rh- rhb rhc rhe rhh rhi rhr rhs rhu rib ric rie rih rii rir ris rrb rrc rrh rri rrr rrs rru rsb rsc rse rsh rsi rsr rss rsu rub ruc rue ruh rui rur rus ruu sbb sbc sbe sbh sbi sbr sbs sbu scb scc sce sch sci scr scs scu se- seb sec see seh sei ser ses seu sh- shb shc she shh shi shr shs shu sib sic sie sih sii sir sis siu sr- srb src sre srh sri srr srs ss- ssb ssc sse ssh ssi ssr sss ssu sub suc sue suh sui sur sus suu ubb ubc ube ubh ubi ubr ubs ubu ucb ucc uce uch uci ucr ucs ucu ueb uec uee ueh uei uer ues uhb uhc uhe uhh uhi uhr uhs uhu uib uic uie uii uir uis uiu ur- urb urc ure uri urr urs uru usb usc use ush usi usr uss usu uuc uue uur uus uuu