-er -ic b-p bbb bbc bbe bbh bbi bbn bbp bbr bbs bcb bcc bce bch bci bcn bcp bcr bcs be- beb bec bee beh bei ben bep ber bes bhb bhc bhe bhh bhi bhp bhr bhs bi- bib bic bie bih bii bin bip bir bis bnb bnc bne bni bnn bnp bnr bns bpb bpc bpe bph bpi bpn bpp bpr bps brb bre brh bri brn brp brr brs bsb bsc bse bsh bsi bsn bsp bsr bss c-- cbb cbc cbe cbh cbi cbn cbp cbr cbs ccb ccc cce cch cci ccn ccp ccr ccs ce- ceb cec cee ceh cei cen cep cer ces ch- chb chc che chh chi chn chp chr chs ci- cib cic cie cih cii cin cip cir cis cn- cnb cnc cne cnh cni cnn cnp cnr cns cpb cpc cpe cph cpi cpn cpp cpr cps crb crc cre crh cri crn crp crr crs csb csc cse csh csi csn csp csr css ebb ebc ebe ebh ebi ebn ebp ebr ebs ec- ecb ecc ece ech eci ecn ecr ecs eeb eec eee een eep eer ees ehb ehc ehe ehh ehi ehn ehp ehr ehs eib eic eie eii ein eip eir eis en- enb enc ene enh eni enn enp enr ens ep- epb epc epe eph epi epn epp epr eps erb erc ere erh eri ern erp err ers es- esb esc ese esh esi esn esp esr ess h-i hbb hbc hbe hbh hbi hbn hbp hbr hbs hcb hcc hce hch hci hcn hcp hcr hcs he- heb hec hee heh hei hen hep her hes hhb hhc hhe hhh hhi hhn hhp hhr hhs hib hic hie hih hii hin hip hir his hnb hnc hne hnh hnn hns hpb hpc hpe hph hpi hpn hpp hpr hps hr- hrb hrc hre hrh hri hrn hrp hrr hrs hsb hsc hse hsh hsi hsn hsp hsr hss ibb ibc ibe ibh ibi ibn ibp ibr ibs icb icc ice ich ici icn icp icr ics ie- iec iee iei ien iep ier ies ihb ihc ihe ihh ihi ihn ihp ihr ihs iib iic iie iih iii iin iip iir iis in- inb inc ine inh ini inn inp inr ins ipb ipc ipe ipi ipn ipp ipr ips ir- irb irc ire iri irn irp irr irs is- isb isc ise ish isi isn isp isr iss n-i nbb nbc nbe nbi nbn nbp nbr nbs ncb ncc nce nch nci ncn ncp ncr ncs ne- neb nec nee neh nei nen nep ner nes nhb nhc nhe nhh nhi nhn nhp nhr nhs nib nic nie nih nii nin nip nir nis nnb nnc nne nnh nni nnn nnp nns npb npc npe nph npi npn npp npr nps nrb nrc nre nri nrn nrp nrr nrs nsb nsc nse nsh nsi nsn nsp nsr nss p-p pbb pbc pbe pbi pbn pbp pbr pbs pcb pcc pce pch pci pcn pcp pcr pcs peb pec pee peh pei pen pep per pes phb phc phe phi phn php phr phs pib pic pie pih pii pin pip pir pis pn- pnb pnc pne pnh pni pnn pnp pnr pns ppb ppc ppe pph ppi ppn ppp ppr pps prb prc pre prh pri prn prp prr prs ps- psb psc pse psh psi psn psp psr pss rbb rbc rbe rbh rbi rbn rbp rbr rbs rcb rcc rce rch rci rcn rcp rcr rcs re- reb rec ree reh rei ren rep rer res rh- rhb rhc rhe rhh rhi rhn rhp rhr rhs rib ric rie rih rii rin rip rir ris rnb rnc rnh rni rnn rnp rnr rns rpb rpc rpe rph rpi rpn rpp rpr rps rrb rrc rrh rri rrn rrp rrr rrs rsb rsc rse rsh rsi rsn rsp rsr rss sbb sbc sbe sbh sbi sbn sbp sbr sbs scb scc sce sch sci scn scp scr scs se- seb sec see seh sei sen sep ser ses sh- shb shc she shh shi shn shp shr shs sib sic sie sih sii sin sip sir sis snb snc sne sni snn snp snr sns spb spc spe sph spi spn spp spr sps sr- srb src sre srh sri srn srp srr srs ss- ssb ssc sse ssh ssi ssn ssp ssr sss