-er -ic bbb bbc bbe bbg bbi bbk bbn bbr bbs bcb bcc bce bcg bci bck bcn bcr bcs be- beb bec bee beg bei bek ben ber bes bgb bgc bge bgg bgi bgk bgn bgr bgs bi- bib bic bie big bii bik bin bir bis bkb bkc bke bkg bkk bkn bkr bks bnb bnc bne bng bni bnk bnn bnr bns brb bre brg bri brk brn brr brs bsb bsc bse bsg bsi bsk bsn bsr bss c-- cbb cbc cbe cbg cbi cbk cbn cbr cbs ccb ccc cce ccg cci cck ccn ccr ccs ce- ceb cec cee ceg cei cek cen cer ces cgb cgc cge cgg cgi cgn cgr cgs ci- cib cic cie cig cii cik cin cir cis ckb ckc cki cks cn- cnb cnc cne cng cni cnn cnr cns crb crc cre crg cri crk crn crr crs csb csc cse csg csi csk csn csr css ebb ebc ebe ebg ebi ebk ebn ebr ebs ec- ecb ecc ece ecg eci eck ecn ecr ecs eeb eec eee eeg eek een eer ees egb egc ege egg egi egn egr egs eib eic eie eig eii eik ein eir eis ekb ekc eke ekg eki ekr eks en- enb enc ene eng eni enk enn enr ens erb erc ere erg eri erk ern err ers es- esb esc ese esg esi esk esn esr ess gbc gbe gbg gbi gbk gbn gbr gbs gcb gcc gce gcg gci gck gcn gcr gcs ge- geb gec gee geg gei gek gen ger ges ggb ggc ggg ggi ggn ggr ggs gib gic gie gig gii gik gin gir gis gkb gkn gks gnb gnc gne gni gnn gnr gns grb grc gre grg gri grk grn grr grs gsb gsc gse gsg gsi gsk gsn gsr gss ibb ibc ibe ibg ibi ibk ibn ibr ibs icb icc ice icg ici ick icn icr ics ie- iec iee ieg iei iek ien ier ies igb igc ige igg igi igk ign igr igs iib iic iie iii iin iir iis ikb ikc ike iki ikk ikr iks in- inb inc ine ing ini ink inn inr ins ir- irb irc ire irg iri irk irn irr irs is- isb isc ise isg isi isk isn isr iss kbb kbc kbe kbi kbk kbn kbr kbs kcb kcc kce kcg kci kck kcn kcr kcs ke- keb kec kee keg kei kek ken ker kes kgb kgc kgi kgs kib kic kie kig kii kik kin kir kis kkb kkc kke kki kkk kkn kkr kks kn- knc kne kng kni knk knn knr krc krg kri krk krn krr krs ksb ksc kse ksg ksi ksk ksn ksr kss n-i nbb nbc nbe nbg nbi nbk nbn nbr nbs ncb ncc nce ncg nci nck ncn ncr ncs ne- neb nec nee neg nei nek nen ner nes ngb ngc nge ngg ngi ngk ngn ngs nib nic nie nig nii nik nin nir nis nkc nke nki nkk nkn nkr nks nnb nnc nne nng nni nnk nnn nns nrb nrc nre nrg nri nrk nrn nrr nrs nsb nsc nse nsg nsi nsk nsn nsr nss rbb rbc rbe rbg rbi rbk rbn rbr rbs rcb rcc rce rcg rci rcn rcr rcs re- reb rec ree reg rei rek ren rer res rgb rgc rge rgg rgi rgk rgn rgr rgs rib ric rie rig rii rik rin rir ris rkb rkc rke rkg rkk rks rnb rnc rng rni rnn rnr rns rrb rrc rrg rri rrk rrn rrr rrs rsb rsc rse rsg rsi rsk rsn rsr rss sbb sbc sbe sbg sbi sbk sbn sbr sbs scb scc sce scg sci sck scn scr scs se- seb sec see seg sei sek sen ser ses sgb sgc sge sgg sgi sgk sgn sgr sgs sib sic sie sig sii sik sin sir sis sk- skb skc ske skg ski skk skr sks snb snc sne sng sni snk snn snr sns sr- srb src sre srg sri srk srn srr srs ss- ssb ssc sse ssg ssi ssk ssn ssr sss