-er -ic bbb bbc bbe bbg bbh bbi bbk bbr bbs bcb bcc bce bcg bch bci bck bcr bcs be- beb bec bee beg beh bei bek ber bes bgb bgc bge bgg bgh bgi bgk bgr bgs bhb bhc bhe bhg bhh bhi bhk bhr bhs bi- bib bic bie big bih bii bik bir bis bkb bkc bke bkg bkk bkr bks brb bre brg brh bri brk brr brs bsb bsc bse bsg bsh bsi bsk bsr bss c-- cbb cbc cbe cbg cbh cbi cbk cbr cbs ccb ccc cce ccg cch cci cck ccr ccs ce- ceb cec cee ceg ceh cei cek cer ces cgb cgc cge cgg cgh cgi cgr cgs ch- chb chc che chg chh chi chk chr chs ci- cib cic cie cig cih cii cik cir cis ckb ckc ckh cki cks crb crc cre crg crh cri crk crr crs csb csc cse csg csh csi csk csr css ebb ebc ebe ebg ebh ebi ebk ebr ebs ec- ecb ecc ece ecg ech eci eck ecr ecs eeb eec eee eeg eek eer ees egb egc ege egg egh egi egr egs ehb ehc ehe ehg ehh ehi ehr ehs eib eic eie eig eii eik eir eis ekb ekc eke ekg ekh eki ekr eks erb erc ere erg erh eri erk err ers es- esb esc ese esg esh esi esk esr ess gbc gbe gbg gbh gbi gbk gbr gbs gcb gcc gce gcg gch gci gck gcr gcs ge- geb gec gee geg geh gei gek ger ges ggb ggc ggg ggh ggi ggr ggs ghb ghc ghe ghg ghh ghi ghr ghs gib gic gie gig gih gii gik gir gis gkb gkh gks grb grc gre grg grh gri grk grr grs gsb gsc gse gsg gsi gsk gsr gss h-i hbb hbc hbe hbg hbh hbi hbk hbr hbs hcb hcc hce hcg hch hci hck hcr hcs he- heb hec hee heg heh hei hek her hes hgb hgc hge hgg hgh hgi hgk hgr hgs hhb hhc hhe hhg hhh hhi hhk hhr hhs hib hic hie hig hih hii hik hir his hkb hkg hkh hki hkk hkr hks hr- hrb hrc hre hrg hrh hri hrk hrr hrs hsb hsc hse hsg hsh hsi hsk hsr hss ibb ibc ibe ibg ibh ibi ibk ibr ibs icb icc ice icg ich ici ick icr ics ie- iec iee ieg iei iek ier ies igb igc ige igg igh igi igk igr igs ihb ihc ihe ihg ihh ihi ihk ihr ihs iib iic iie iih iii iir iis ikb ikc ike iki ikk ikr iks ir- irb irc ire irg iri irk irr irs is- isb isc ise isg ish isi isk isr iss kbb kbc kbe kbh kbi kbk kbr kbs kcb kcc kce kcg kch kci kck kcr kcs ke- keb kec kee keg keh kei kek ker kes kgb kgc kgh kgi kgs khe khh khi khk khr khs kib kic kie kig kih kii kik kir kis kkb kkc kke kkh kki kkk kkr kks krc krg kri krk krr krs ksb ksc kse ksg ksh ksi ksk ksr kss rbb rbc rbe rbg rbh rbi rbk rbr rbs rcb rcc rce rcg rch rci rcr rcs re- reb rec ree reg reh rei rek rer res rgb rgc rge rgg rgh rgi rgk rgr rgs rh- rhb rhc rhe rhg rhh rhi rhr rhs rib ric rie rig rih rii rik rir ris rkb rkc rke rkg rkk rks rrb rrc rrg rrh rri rrk rrr rrs rsb rsc rse rsg rsh rsi rsk rsr rss sbb sbc sbe sbg sbh sbi sbk sbr sbs scb scc sce scg sch sci sck scr scs se- seb sec see seg seh sei sek ser ses sgb sgc sge sgg sgh sgi sgk sgr sgs sh- shb shc she shg shh shi shk shr shs sib sic sie sig sih sii sik sir sis sk- skb skc ske skg skh ski skk skr sks sr- srb src sre srg srh sri srk srr srs ss- ssb ssc sse ssg ssh ssi ssk ssr sss