-er -up b-p b-u bbb bbd bbe bbn bbp bbr bbt bbu bdb bdd bde bdp bdr bdt bdu be- beb bed bee ben bep ber bet beu bnb bnd bne bnn bnp bnr bnt bnu bpb bpd bpe bpn bpp bpr bpt bpu brb brd bre brn brp brr brt bru btb btd bte btn btp btr btt btu bub bud bue bun bup bur but buu dbb dbd dbe dbn dbp dbr dbt dbu ddb ddd dde ddn ddp ddr ddt ddu de- deb ded dee den dep der det deu dnb dnd dne dnn dnp dnr dnt dpb dpd dpe dpn dpp dpr dpt dpu drb drd dre drn drp drr drt dru dtb dtd dte dtn dtp dtr dtt dtu dub dud due dun dup dur dut ebb ebd ebe ebn ebp ebr ebt ebu ed- edb edd ede edn edp edr edt edu eeb eed eee een eep eer eet en- enb end ene enn enp enr ent enu ep- epb epd epe epn epp epr ept epu erb erd ere ern erp err ert eru etb etd ete etn etp etr ett etu eu- eub eud eue eun eup eur eut nbb nbd nbe nbn nbp nbr nbt nbu ndb ndd nde ndn ndp ndr ndt ndu ne- neb ned nee nen nep ner net neu nnb nne nnn nnp nnt nnu npb npd npe npn npp npr npt npu nrb nrd nre nrn nrp nrr nrt nru ntb ntd nte ntn ntp ntr ntt ntu nub nud nue nun nup nur nut nuu p-p pbb pbd pbe pbn pbp pbr pbt pbu pdb pdd pde pdn pdp pdr pdt pdu peb ped pee pen pep per pet peu pn- pnb pnd pne pnn pnp pnr pnt pnu ppb ppd ppe ppn ppp ppr ppt ppu prb prd pre prn prp prr prt pru pt- ptb ptd pte ptn ptp ptr ptt ptu pub pud pue pun pup pur put puu rbb rbd rbe rbn rbp rbr rbt rbu rdb rdd rde rdn rdp rdr rdt rdu re- reb red ree ren rep rer ret reu rnb rnd rnn rnp rnr rnt rnu rpb rpd rpe rpn rpp rpr rpt rpu rrb rrd rrn rrp rrr rrt rru rtb rtd rte rtn rtp rtr rtt rtu rub rud rue run rup rur rut ruu tbb tbd tbe tbn tbp tbr tbt tbu tdb tdd tde tdn tdp tdr tdt tdu te- teb ted tee ten tep ter tet teu tnb tnd tne tnn tnp tnr tnt tpb tpd tpe tpn tpp tpr tpt tpu trb trd tre trn trp trr trt tru ttb ttd tte ttn ttp ttr ttt ttu tub tud tue tun tup tur tut tuu ubb ube ubn ubp ubr ubt ubu udb udd ude udn udp udr udt udu ueb ued uee uen uep uer uet un- unb und une unn unp unr unt unu up- upb upd upe upn upp upr upt upu ur- urb urd ure urn urp urr urt uru utb utd ute utn utp utr utt utu uue uun uur uut uuu