-er -ic bbb bbc bbd bbe bbi bbm bbo bbr bbs bcb bcc bcd bce bci bcm bco bcr bcs bdb bdc bdd bde bdi bdm bdo bdr bds be- beb bec bed bee bei bem beo ber bes bi- bib bic bid bie bii bim bio bir bis bmb bmc bmd bme bmi bmm bmo bmr bms bob boc bod boe boi bom boo bor bos brb brd bre bri brm bro brr brs bsb bsc bsd bse bsi bsm bso bsr bss c-- cbb cbc cbd cbe cbi cbm cbo cbr cbs ccb ccc ccd cce cci ccm cco ccr ccs cdb cdc cdd cde cdi cdm cdo cdr cds ce- ceb cec ced cee cei cem ceo cer ces ci- cib cic cid cie cii cim cio cir cis cmb cmc cmd cme cmi cmm cmo cmr cms co- cob coc cod coe coi com coo cor cos crb crc crd cre cri crm cro crr crs csb csc csd cse csi csm cso csr css dbb dbc dbd dbe dbi dbm dbo dbr dbs dcb dcc dcd dce dci dcm dco dcr dcs ddb ddc ddd dde ddi ddm ddo ddr dds de- deb dec ded dee dei dem deo der des di- dib dic did die dii dim dio dir dis dmb dmc dmd dme dmi dmm dmo dmr dms dob doc dod doe doi dom doo dor dos drb drc drd dre dri drm dro drr drs dsb dsc dsd dse dsi dsm dso dsr dss ebb ebc ebd ebe ebi ebm ebo ebr ebs ec- ecb ecc ecd ece eci ecm eco ecr ecs ed- edb edc edd ede edi edm edo edr eds eeb eec eed eee eem eeo eer ees eib eic eid eie eii eim eio eir eis em- emb emc emd eme emi emm emo emr ems eo- eob eoc eod eoe eoi eom eoo eor eos erb erc erd ere eri erm ero err ers es- esb esc esd ese esi esm eso esr ess i-d ibb ibc ibd ibe ibi ibm ibo ibr ibs icb icc icd ice ici icm ico icr ics idb idc idd ide idi idm ido idr ids ie- iec ied iee iei iem ier ies iib iic iid iie iii iim iio iir iis im- imb imc imd ime imi imm imo ims io- iob ioc iod ioe ioi iom ioo ior ios ir- irb irc ird ire iri irm iro irr irs is- isb isc isd ise isi ism iso isr iss m-o m-r mbb mbc mbd mbe mbi mbm mbo mbr mbs mc- mcb mcc mcd mce mci mcm mco mcr mcs mdb mdc mdd mde mdi mdm mdo mdr mds meb mec med mee mei mem meo mer mes mi- mib mic mid mie mii mim mio mir mis mmb mmc mmd mme mmi mmm mmo mmr mms mob moc mod moe moi mom moo mor mos mrb mrc mrd mre mri mrm mro mrr mrs msb msc msd mse msi msm mso msr mss o-i ob- obb obc obd obe obi obm obo obr obs oc- ocb occ ocd oci ocm oco ocr ocs odb odc odd ode odi odm odo odr ods oeb oec oed oee oei oem oeo oer oes oib oic oid oie oii oim oio oir ois om- omb omc omd ome omi omm omo omr oms oo- oob ooc ood ooi oom ooo oor oos or- orb orc ord ore ori orm oro orr ors os- osb osc osd ose osi osm oso osr oss rbb rbc rbd rbe rbi rbm rbo rbr rbs rcb rcc rcd rce rci rcm rco rcr rcs rdb rdc rdd rde rdi rdm rdo rdr rds re- reb rec red ree rei rem reo rer res rib ric rid rie rii rim rio rir ris rmb rmc rmd rme rmi rmm rmo rmr rms rob roc rod roe roi rom roo ror ros rrb rrc rrd rri rrm rrr rrs rsb rsc rsd rse rsi rsm rso rsr rss sbb sbc sbd sbe sbi sbm sbo sbr sbs scb scc scd sce sci scm sco scr scs sdb sdc sdd sde sdi sdm sdo sdr sds se- seb sec sed see sei sem seo ser ses sib sic sid sie sii sim sio sir sis smb smc smd sme smi smm smo smr sms sob soc sod soe soi som soo sor sos sr- srb src srd sre sri srm sro srr srs ss- ssb ssc ssd sse ssi ssm sso ssr sss