-er -ic bbb bbc bbe bbh bbi bbo bbr bbs bcb bcc bce bch bci bco bcr bcs be- beb bec bee beh bei beo ber bes bhb bhc bhe bhh bhi bho bhr bhs bi- bib bic bie bih bii bio bir bis bob boc boe boh boi boo bor bos brb bre brh bri bro brr brs bsb bsc bse bsh bsi bso bsr bss c-- cbb cbc cbe cbh cbi cbo cbr cbs ccb ccc cce cch cci cco ccr ccs ce- ceb cec cee ceh cei ceo cer ces ch- chb chc che chh chi cho chr chs ci- cib cic cie cih cii cio cir cis co- cob coc coe coh coi coo cor cos crb crc cre crh cri cro crr crs csb csc cse csh csi cso csr css ebb ebc ebe ebh ebi ebo ebr ebs ec- ecb ecc ece ech eci eco ecr ecs eeb eec eee eeo eer ees ehb ehc ehe ehh ehi eho ehr ehs eib eic eie eii eio eir eis eo- eob eoc eoe eoh eoi eoo eor eos erb erc ere erh eri ero err ers es- esb esc ese esh esi eso esr ess h-i hbb hbc hbe hbh hbi hbo hbr hbs hcb hcc hce hch hci hco hcr hcs he- heb hec hee heh hei heo her hes hhb hhc hhe hhh hhi hho hhr hhs hib hic hie hih hii hio hir his hob hoc hoe hoh hoi hoo hor hos hr- hrb hrc hre hrh hri hro hrr hrs hsb hsc hse hsh hsi hsr hss ibb ibc ibe ibh ibi ibo ibr ibs icb icc ice ich ici ico icr ics ie- iec iee iei ier ies ihb ihc ihe ihh ihi iho ihr ihs iib iic iie iih iii iio iir iis io- iob ioc ioe ioh ioi ioo ior ios ir- irb irc ire iri iro irr irs is- isb isc ise ish isi iso isr iss o-i ob- obb obc obe obh obi obo obr obs oc- ocb occ och oci oco ocr ocs oeb oec oee oeh oei oeo oer oes ohc ohe ohh ohi oho ohr ohs oib oic oie oii oio oir ois oo- oob ooc ooh ooi ooo oor oos or- orb orc ore orh ori oro orr ors os- osb osc ose osh osi oso osr oss rbb rbc rbe rbh rbi rbo rbr rbs rcb rcc rce rch rci rco rcr rcs re- reb rec ree reh rei reo rer res rh- rhb rhc rhe rhh rhi rho rhr rhs rib ric rie rih rii rio rir ris rob roc roe roh roi roo ror ros rrb rrc rrh rri rrr rrs rsb rsc rse rsh rsi rso rsr rss sbb sbc sbe sbh sbi sbo sbr sbs scb scc sce sch sci sco scr scs se- seb sec see seh sei seo ser ses sh- shb shc she shh shi sho shr shs sib sic sie sih sii sio sir sis sob soc soe soh soi soo sor sos sr- srb src sre srh sri sro srr srs ss- ssb ssc sse ssh ssi sso ssr sss