-er bbb bbc bbe bbg bbh bbm bbo bbr bbs bcb bcc bce bcg bch bcm bco bcr bcs be- beb bec bee beg beh bem beo ber bes bgb bgc bge bgg bgh bgm bgo bgr bgs bhb bhc bhe bhg bhh bhm bho bhr bhs bmb bmc bme bmg bmh bmm bmo bmr bms bob boc boe bog boh bom boo bor bos brb bre brg brh brm bro brr brs bsb bsc bse bsg bsh bsm bso bsr bss c-- cbb cbc cbe cbg cbh cbm cbo cbr cbs ccb ccc cce ccg cch ccm cco ccr ccs ce- ceb cec cee ceg ceh cem ceo cer ces cgb cgc cge cgg cgh cgm cgo cgr cgs ch- chb chc che chg chh chm cho chr chs cmb cmc cme cmg cmh cmm cmo cmr cms co- cob coc coe cog coh com coo cor cos crb crc cre crg crh crm cro crr crs csb csc cse csg csh csm cso csr css ebb ebc ebe ebg ebh ebm ebo ebr ebs ec- ecb ecc ece ecg ech ecm eco ecr ecs eeb eec eee eeg eem eeo eer ees egb egc ege egg egh egm ego egr egs ehb ehc ehe ehg ehh ehm eho ehr ehs em- emb emc eme emg emh emm emo emr ems eo- eob eoc eoe eog eoh eom eoo eor eos erb erc ere erg erh erm ero err ers es- esb esc ese esg esh esm eso esr ess gbc gbe gbg gbh gbm gbo gbr gbs gcb gcc gce gcg gch gcm gco gcr gcs ge- geb gec gee geg geh gem geo ger ges ggb ggc ggg ggh ggm ggo ggr ggs ghb ghc ghe ghg ghh gho ghr ghs gmb gmc gme gmg gmh gmm gmo gmr gms gob goc goe gog goh gom goo gor gos grb grc gre grg grh grm gro grr grs gsb gsc gse gsg gsm gso gsr gss hbb hbc hbe hbg hbh hbm hbo hbr hbs hcb hcc hce hcg hch hcm hco hcr hcs he- heb hec hee heg heh hem heo her hes hgb hgc hge hgg hgh hgm hgo hgr hgs hhb hhc hhe hhg hhh hhm hho hhr hhs hmb hmc hme hmg hmh hmm hmo hmr hms hob hoc hoe hog hoh hom hoo hor hos hr- hrb hrc hre hrg hrh hrm hro hrr hrs hsb hsc hse hsg hsh hsm hsr hss m-o m-r mbb mbc mbe mbg mbh mbm mbo mbr mbs mc- mcb mcc mce mcg mch mcm mco mcr mcs meb mec mee meg meh mem meo mer mes mgb mgc mge mgh mgm mgo mgr mgs mhc mhg mhh mhm mho mhr mhs mmb mmc mme mmg mmh mmm mmo mmr mms mob moc moe mog moh mom moo mor mos mrb mrc mre mrg mrh mrm mro mrr mrs msb msc mse msg msh msm mso msr mss ob- obb obc obe obg obh obm obo obr obs oc- ocb occ ocg och ocm oco ocr ocs oeb oec oee oeg oeh oem oeo oer oes ogc oge ogg ogh ogo ogs ohc ohe ohg ohh ohm oho ohr ohs om- omb omc ome omg omh omm omo omr oms oo- oob ooc oog ooh oom ooo oor oos or- orb orc ore org orh orm oro orr ors os- osb osc ose osg osh osm oso osr oss rbb rbc rbe rbg rbh rbm rbo rbr rbs rcb rcc rce rcg rch rcm rco rcr rcs re- reb rec ree reg reh rem reo rer res rgb rgc rge rgg rgh rgo rgr rgs rh- rhb rhc rhe rhg rhh rhm rho rhr rhs rmb rmc rme rmg rmh rmm rmo rmr rms rob roc roe rog roh rom roo ror ros rrb rrc rrg rrh rrm rrr rrs rsb rsc rse rsg rsh rsm rso rsr rss sbb sbc sbe sbg sbh sbm sbo sbr sbs scb scc sce scg sch scm sco scr scs se- seb sec see seg seh sem seo ser ses sgb sgc sge sgg sgh sgm sgo sgr sgs sh- shb shc she shg shh shm sho shr shs smb smc sme smg smh smm smo smr sms sob soc soe sog soh som soo sor sos sr- srb src sre srg srh srm sro srr srs ss- ssb ssc sse ssg ssh ssm sso ssr sss