-er bbb bbc bbe bbg bbh bbn bbo bbr bbs bcb bcc bce bcg bch bcn bco bcr bcs be- beb bec bee beg beh ben beo ber bes bgb bgc bge bgg bgh bgn bgo bgr bgs bhb bhc bhe bhg bhh bho bhr bhs bnb bnc bne bng bnn bno bnr bns bob boc boe bog boh bon boo bor bos brb bre brg brh brn bro brr brs bsb bsc bse bsg bsh bsn bso bsr bss c-- cbb cbc cbe cbg cbh cbn cbo cbr cbs ccb ccc cce ccg cch ccn cco ccr ccs ce- ceb cec cee ceg ceh cen ceo cer ces cgb cgc cge cgg cgh cgn cgo cgr cgs ch- chb chc che chg chh chn cho chr chs cn- cnb cnc cne cng cnh cnn cno cnr cns co- cob coc coe cog coh con coo cor cos crb crc cre crg crh crn cro crr crs csb csc cse csg csh csn cso csr css ebb ebc ebe ebg ebh ebn ebo ebr ebs ec- ecb ecc ece ecg ech ecn eco ecr ecs eeb eec eee eeg een eeo eer ees egb egc ege egg egh egn ego egr egs ehb ehc ehe ehg ehh ehn eho ehr ehs en- enb enc ene eng enh enn eno enr ens eo- eob eoc eoe eog eoh eon eoo eor eos erb erc ere erg erh ern ero err ers es- esb esc ese esg esh esn eso esr ess gbc gbe gbg gbh gbn gbo gbr gbs gcb gcc gce gcg gch gcn gco gcr gcs ge- geb gec gee geg geh gen geo ger ges ggb ggc ggg ggh ggn ggo ggr ggs ghb ghc ghe ghg ghh ghn gho ghr ghs gnb gnc gne gnn gno gnr gns gob goc goe gog goh gon goo gor gos grb grc gre grg grh grn gro grr grs gsb gsc gse gsg gsn gso gsr gss hbb hbc hbe hbg hbh hbn hbo hbr hbs hcb hcc hce hcg hch hcn hco hcr hcs he- heb hec hee heg heh hen heo her hes hgb hgc hge hgg hgh hgn hgo hgr hgs hhb hhc hhe hhg hhh hhn hho hhr hhs hnb hnc hne hng hnh hnn hno hns hob hoc hoe hog hoh hon hoo hor hos hr- hrb hrc hre hrg hrh hrn hro hrr hrs hsb hsc hse hsg hsh hsn hsr hss nbb nbc nbe nbg nbn nbo nbr nbs ncb ncc nce ncg nch ncn nco ncr ncs ne- neb nec nee neg neh nen neo ner nes ngb ngc nge ngg ngh ngn ngo ngs nhb nhc nhe nhg nhh nhn nhr nhs nnb nnc nne nng nnh nnn nno nns no- nob noc noe nog noh non noo nor nos nrb nrc nre nrg nrn nro nrr nrs nsb nsc nse nsg nsh nsn nso nsr nss ob- obb obc obe obg obh obn obo obr obs oc- ocb occ ocg och ocn oco ocr ocs oeb oec oee oeg oeh oen oeo oer oes ogc oge ogg ogh ogn ogo ogs ohc ohe ohg ohh ohn oho ohr ohs on- onb onc one ong onh onn ono onr ons oo- oob ooc oog ooh oon ooo oor oos or- orb orc ore org orh orn oro orr ors os- osb osc ose osg osh osn oso osr oss rbb rbc rbe rbg rbh rbn rbo rbr rbs rcb rcc rce rcg rch rcn rco rcr rcs re- reb rec ree reg reh ren reo rer res rgb rgc rge rgg rgh rgn rgo rgr rgs rh- rhb rhc rhe rhg rhh rhn rho rhr rhs rnb rnc rng rnh rnn rno rnr rns rob roc roe rog roh ron roo ror ros rrb rrc rrg rrh rrn rrr rrs rsb rsc rse rsg rsh rsn rso rsr rss sbb sbc sbe sbg sbh sbn sbo sbr sbs scb scc sce scg sch scn sco scr scs se- seb sec see seg seh sen seo ser ses sgb sgc sge sgg sgh sgn sgo sgr sgs sh- shb shc she shg shh shn sho shr shs snb snc sne sng snn sno snr sns sob soc soe sog soh son soo sor sos sr- srb src sre srg srh srn sro srr srs ss- ssb ssc sse ssg ssh ssn sso ssr sss