-er -up b-p b-u bbb bbc bbd bbe bbn bbp bbr bbu bbx bcb bcc bcd bce bcn bcp bcr bcu bcx bdb bdc bdd bde bdp bdr bdu bdx be- beb bec bed bee ben bep ber beu bex bnb bnc bnd bne bnn bnp bnr bnu bnx bpb bpc bpd bpe bpn bpp bpr bpu bpx brb brd bre brn brp brr bru brx bub buc bud bue bun bup bur buu bux bxb bxd bxn bxx c-- cbb cbc cbd cbe cbn cbp cbr cbu cbx ccb ccc ccd cce ccn ccp ccr ccu ccx cdb cdc cdd cde cdn cdp cdr cdu cdx ce- ceb cec ced cee cen cep cer ceu cex cn- cnb cnc cnd cne cnn cnp cnr cnu cnx cpb cpc cpd cpe cpn cpp cpr cpu cpx crb crc crd cre crn crp crr cru crx cub cuc cud cue cun cup cur cuu cxc cxp cxr cxx dbb dbc dbd dbe dbn dbp dbr dbu dbx dcb dcc dcd dce dcn dcp dcr dcu dcx ddb ddc ddd dde ddn ddp ddr ddu ddx de- deb dec ded dee den dep der deu dex dnb dnc dnd dne dnn dnp dnr dpb dpc dpd dpe dpn dpp dpr dpu drb drc drd dre drn drp drr dru drx dub duc dud due dun dup dur dux dxc dxd dxn dxp dxr dxx ebb ebc ebd ebe ebn ebp ebr ebu ebx ec- ecb ecc ecd ece ecn ecr ecu ecx ed- edb edc edd ede edn edp edr edu edx eeb eec eed eee een eep eer eex en- enb enc end ene enn enp enr enu ep- epb epc epd epe epn epp epr epu epx erb erc erd ere ern erp err eru eu- eub euc eud eue eun eup eur eux ex- exc exd exe exp exr exu exx nbb nbc nbd nbe nbn nbp nbr nbu nbx ncb ncc ncd nce ncn ncp ncr ncu ncx ndb ndc ndd nde ndn ndp ndr ndu ne- neb nec ned nee nen nep ner neu nex nnb nnc nne nnn nnp nnu npb npc npd npe npn npp npr npu nrb nrc nrd nre nrn nrp nrr nru nrx nub nuc nud nue nun nup nur nuu nux nxc nxd p-p pbb pbc pbd pbe pbn pbp pbr pbu pbx pcb pcc pcd pce pcn pcp pcr pcu pcx pdb pdc pdd pde pdn pdp pdr pdu pdx peb pec ped pee pen pep per peu pex pn- pnb pnc pnd pne pnn pnp pnr pnu pnx ppb ppc ppd ppe ppn ppp ppr ppu ppx prb prc prd pre prn prp prr pru prx pub puc pud pue pun pup pur puu pxc pxe pxr rbb rbc rbd rbe rbn rbp rbr rbu rbx rcb rcc rcd rce rcn rcp rcr rcu rcx rdb rdc rdd rde rdn rdp rdr rdu rdx re- reb rec red ree ren rep rer reu rex rnb rnc rnd rnn rnp rnr rnu rpb rpc rpd rpe rpn rpp rpr rpu rpx rrb rrc rrd rrn rrp rrr rru rub ruc rud rue run rup rur ruu rux rxp rxr ubb ubc ube ubn ubp ubr ubu ubx ucb ucc ucd uce ucn ucp ucr ucu udb udc udd ude udn udp udr udu udx ueb uec ued uee uen uep uer un- unb unc und une unn unp unr unu unx up- upb upc upd upe upn upp upr upu upx ur- urb urc urd ure urn urp urr uru urx uuc uue uun uur uuu uxb uxc uxr uxu xbc xbe xbr xbx xcb xcd xcp xcr xcx xdb xdc xde xdr xed xee xen xep xer xeu xex xnc xnu xpb xpc xpd xpe xpn xpp xrc xrd xrx xue xun xup xxp xxx