-er -up b-p b-u bbb bbc bbe bbh bbn bbp bbr bbu bcb bcc bce bch bcn bcp bcr bcu be- beb bec bee beh ben bep ber beu bhb bhc bhe bhh bhp bhr bhu bnb bnc bne bnn bnp bnr bnu bpb bpc bpe bph bpn bpp bpr bpu brb bre brh brn brp brr bru bub buc bue buh bun bup bur buu c-- cbb cbc cbe cbh cbn cbp cbr cbu ccb ccc cce cch ccn ccp ccr ccu ce- ceb cec cee ceh cen cep cer ceu ch- chb chc che chh chn chp chr chu cn- cnb cnc cne cnh cnn cnp cnr cnu cpb cpc cpe cph cpn cpp cpr cpu crb crc cre crh crn crp crr cru cub cuc cue cuh cun cup cur cuu ebb ebc ebe ebh ebn ebp ebr ebu ec- ecb ecc ece ech ecn ecr ecu eeb eec eee een eep eer ehb ehc ehe ehh ehn ehp ehr ehu en- enb enc ene enh enn enp enr enu ep- epb epc epe eph epn epp epr epu erb erc ere erh ern erp err eru eu- eub euc eue eun eup eur hbb hbc hbe hbh hbn hbp hbr hbu hcb hcc hce hch hcn hcp hcr he- heb hec hee heh hen hep her heu hhb hhc hhe hhh hhn hhp hhr hhu hnb hnc hne hnh hnn hnu hpb hpc hpe hph hpn hpp hpr hpu hr- hrb hrc hre hrh hrn hrp hrr hru hub huc hue huh hun hup hur huu nbb nbc nbe nbn nbp nbr nbu ncb ncc nce nch ncn ncp ncr ncu ne- neb nec nee neh nen nep ner neu nhb nhc nhe nhh nhn nhp nhr nhu nnb nnc nne nnh nnn nnp nnu npb npc npe nph npn npp npr npu nrb nrc nre nrn nrp nrr nru nub nuc nue nuh nun nup nur nuu p-p pbb pbc pbe pbn pbp pbr pbu pcb pcc pce pch pcn pcp pcr pcu peb pec pee peh pen pep per peu phb phc phe phn php phr phu pn- pnb pnc pne pnh pnn pnp pnr pnu ppb ppc ppe pph ppn ppp ppr ppu prb prc pre prh prn prp prr pru pub puc pue puh pun pup pur puu rbb rbc rbe rbh rbn rbp rbr rbu rcb rcc rce rch rcn rcp rcr rcu re- reb rec ree reh ren rep rer reu rh- rhb rhc rhe rhh rhn rhp rhr rhu rnb rnc rnh rnn rnp rnr rnu rpb rpc rpe rph rpn rpp rpr rpu rrb rrc rrh rrn rrp rrr rru rub ruc rue ruh run rup rur ruu ubb ubc ube ubh ubn ubp ubr ubu ucb ucc uce uch ucn ucp ucr ucu ueb uec uee ueh uen uep uer uhb uhc uhe uhh uhp uhr uhu un- unb unc une unh unn unp unr unu up- upb upc upe uph upn upp upr upu ur- urb urc ure urn urp urr uru uuc uue uun uur uuu