-er -ic b-p bbb bbc bbe bbh bbi bbn bbp bbr bcb bcc bce bch bci bcn bcp bcr be- beb bec bee beh bei ben bep ber bhb bhc bhe bhh bhi bhp bhr bi- bib bic bie bih bii bin bip bir bnb bnc bne bni bnn bnp bnr bpb bpc bpe bph bpi bpn bpp bpr brb bre brh bri brn brp brr c-- cbb cbc cbe cbh cbi cbn cbp cbr ccb ccc cce cch cci ccn ccp ccr ce- ceb cec cee ceh cei cen cep cer ch- chb chc che chh chi chn chp chr ci- cib cic cie cih cii cin cip cir cn- cnb cnc cne cnh cni cnn cnp cnr cpb cpc cpe cph cpi cpn cpp cpr crb crc cre crh cri crn crp crr ebb ebc ebe ebh ebi ebn ebp ebr ec- ecb ecc ece ech eci ecn ecr eeb eec eee een eep eer ehb ehc ehe ehh ehi ehn ehp ehr eib eic eie eii ein eip eir en- enb enc ene enh eni enn enp enr ep- epb epc epe eph epi epn epp epr erb erc ere erh eri ern erp err h-i hbb hbc hbe hbh hbi hbn hbp hbr hcb hcc hce hch hci hcn hcp hcr he- heb hec hee heh hei hen hep her hhb hhc hhe hhh hhi hhn hhp hhr hib hic hie hih hii hin hip hir hnb hnc hne hnh hnn hpb hpc hpe hph hpi hpn hpp hpr hr- hrb hrc hre hrh hri hrn hrp hrr ibb ibc ibe ibh ibi ibn ibp ibr icb icc ice ich ici icn icp icr ie- iec iee iei ien iep ier ihb ihc ihe ihh ihi ihn ihp ihr iib iic iie iih iii iin iip iir in- inb inc ine inh ini inn inp inr ipb ipc ipe ipi ipn ipp ipr ir- irb irc ire iri irn irp irr n-i nbb nbc nbe nbi nbn nbp nbr ncb ncc nce nch nci ncn ncp ncr ne- neb nec nee neh nei nen nep ner nhb nhc nhe nhh nhi nhn nhp nhr nib nic nie nih nii nin nip nir nnb nnc nne nnh nni nnn nnp npb npc npe nph npi npn npp npr nrb nrc nre nri nrn nrp nrr p-p pbb pbc pbe pbi pbn pbp pbr pcb pcc pce pch pci pcn pcp pcr peb pec pee peh pei pen pep per phb phc phe phi phn php phr pib pic pie pih pii pin pip pir pn- pnb pnc pne pnh pni pnn pnp pnr ppb ppc ppe pph ppi ppn ppp ppr prb prc pre prh pri prn prp prr rbb rbc rbe rbh rbi rbn rbp rbr rcb rcc rce rch rci rcn rcp rcr re- reb rec ree reh rei ren rep rer rh- rhb rhc rhe rhh rhi rhn rhp rhr rib ric rie rih rii rin rip rir rnb rnc rnh rni rnn rnp rnr rpb rpc rpe rph rpi rpn rpp rpr rrb rrc rrh rri rrn rrp rrr