-er b-p bbb bbc bbe bbh bbn bbp bbr bcb bcc bce bch bcn bcp bcr be- beb bec bee beh ben bep ber bhb bhc bhe bhh bhp bhr bnb bnc bne bnn bnp bnr bpb bpc bpe bph bpn bpp bpr brb bre brh brn brp brr c-- cbb cbc cbe cbh cbn cbp cbr ccb ccc cce cch ccn ccp ccr ce- ceb cec cee ceh cen cep cer ch- chb chc che chh chn chp chr cn- cnb cnc cne cnh cnn cnp cnr cpb cpc cpe cph cpn cpp cpr crb crc cre crh crn crp crr ebb ebc ebe ebh ebn ebp ebr ec- ecb ecc ece ech ecn ecr eeb eec eee een eep eer ehb ehc ehe ehh ehn ehp ehr en- enb enc ene enh enn enp enr ep- epb epc epe eph epn epp epr erb erc ere erh ern erp err hbb hbc hbe hbh hbn hbp hbr hcb hcc hce hch hcn hcp hcr he- heb hec hee heh hen hep her hhb hhc hhe hhh hhn hhp hhr hnb hnc hne hnh hnn hpb hpc hpe hph hpn hpp hpr hr- hrb hrc hre hrh hrn hrp hrr nbb nbc nbe nbn nbp nbr ncb ncc nce nch ncn ncp ncr ne- neb nec nee neh nen nep ner nhb nhc nhe nhh nhn nhp nhr nnb nnc nne nnh nnn nnp npb npc npe nph npn npp npr nrb nrc nre nrn nrp nrr p-p pbb pbc pbe pbn pbp pbr pcb pcc pce pch pcn pcp pcr peb pec pee peh pen pep per phb phc phe phn php phr pn- pnb pnc pne pnh pnn pnp pnr ppb ppc ppe pph ppn ppp ppr prb prc pre prh prn prp prr rbb rbc rbe rbh rbn rbp rbr rcb rcc rce rch rcn rcp rcr re- reb rec ree reh ren rep rer rh- rhb rhc rhe rhh rhn rhp rhr rnb rnc rnh rnn rnp rnr rpb rpc rpe rph rpn rpp rpr rrb rrc rrh rrn rrp rrr