-er -up b-p b-u bbb bbd bbe bbp bbr bbt bbu bdb bdd bde bdp bdr bdt bdu be- beb bed bee bep ber bet beu bpb bpd bpe bpp bpr bpt bpu brb brd bre brp brr brt bru btb btd bte btp btr btt btu bub bud bue bup bur but buu dbb dbd dbe dbp dbr dbt dbu ddb ddd dde ddp ddr ddt ddu de- deb ded dee dep der det deu dpb dpd dpe dpp dpr dpt dpu drb drd dre drp drr drt dru dtb dtd dte dtp dtr dtt dtu dub dud due dup dur dut ebb ebd ebe ebp ebr ebt ebu ed- edb edd ede edp edr edt edu eeb eed eee eep eer eet ep- epb epd epe epp epr ept epu erb erd ere erp err ert eru etb etd ete etp etr ett etu eu- eub eud eue eup eur eut p-p pbb pbd pbe pbp pbr pbt pbu pdb pdd pde pdp pdr pdt pdu peb ped pee pep per pet peu ppb ppd ppe ppp ppr ppt ppu prb prd pre prp prr prt pru pt- ptb ptd pte ptp ptr ptt ptu pub pud pue pup pur put puu rbb rbd rbe rbp rbr rbt rbu rdb rdd rde rdp rdr rdt rdu re- reb red ree rep rer ret reu rpb rpd rpe rpp rpr rpt rpu rrb rrd rrp rrr rrt rru rtb rtd rte rtp rtr rtt rtu rub rud rue rup rur rut ruu tbb tbd tbe tbp tbr tbt tbu tdb tdd tde tdp tdr tdt tdu te- teb ted tee tep ter tet teu tpb tpd tpe tpp tpr tpt tpu trb trd tre trp trr trt tru ttb ttd tte ttp ttr ttt ttu tub tud tue tup tur tut tuu ubb ube ubp ubr ubt ubu udb udd ude udp udr udt udu ueb ued uee uep uer uet up- upb upd upe upp upr upt upu ur- urb urd ure urp urr urt uru utb utd ute utp utr utt utu uue uur uut uuu

bbbb bbdd bbeb bbet bbpr bd-r bebb bebe bede bedu beeb beed beep beer beet berd bere berr bert beru bete bett betu beur bprd brdt breb bred bree brep brer bret brrr brud brue brup brut btbp btdt btrt bttb bubb bube bubu budb budd bude budu buer bueu bur- burb burd bure burp burr burt buru but- bute butt dbpd dbtt dddd ddre ddub debe debt debu dedd dede dedu deeb deed deep deer deet depe depp depr dept der- derb dere derp derr dete detr deue deur deut dpdt dper dred dree dret drub drue drup drut druu dtdp dted dttp dub- dubb dube dubu dudd dude dudu duer duet dupe dure durt duru dute dutp duur duut ebbr ebed eber ebru ebur edde eddp ede- eder edru edup edur eede eedu eeee eete eetu epee eper eppp eprb eprp epte epub erbb erbe erde ereb ered erer eret erpe erre ertu erub erur etbr etee eter etre ette ettu eude euer eur- eure eurt pbed pdpr ped- pede peed peep peer peet pepd pepe per- perd pere perp perr pert peru pete petr pett peur peut pper pppd pppp ppru pptt ppur pre- preb pred pree prep pret preu prpd prrd prtp prtr prud prue prut pruu pter ptpd ptrd pu-e pube pubu pudu pued puer puet pueu pupe pupu pur- purb pure purp purr puru put- pute putt putu rbbb rbbr rdbp rder rebb rebe rebu redd rede redr redu reeb reed reep reet repe repp repr rept repu rerd rere rert reru retd rete retr rett reue reup reut reuu rpdp rpet rptd rred rrrr rtdt rtee rttp rubb rube rubp rubu rudd rude rudp rued ruer ruet rupe rupp rupt rurd rure rurp ruru rute rutt rutu ruud tbrb tbtp tddb tebu tedd tede teed teer teet tepe tepp tepu ter- tere terp terr teru tete tetr tett tetu teut tpdu tped tper tppd tppp tppr tpte tptp tptr tput tre- tred tree tret treu trpe trpp trte trtr trub trud true trut truu ttbb tter tttt tubb tube tubr tubu tude tudu tuer tuet tupe tupu turb turd ture turp turr turt turu tute tutt tutu u-rp ubbe uber ubet ubud uder udet udpd upbe uped uppe uppp uppu upup urbe urde urdu ure- ured uret urre urte urup urur urut utep uter utpd uttu uuuu

-tree b-e-d bbbee bd-re be-er bebed beber bedde bedee beder bedet bedub bedue beebe beede beerd beete beeut beppe beppu berbe berde berdu bered beret berre berru berte betee beter betre bett- bette beuer beure beute brebu bredd brede bredt breed breer breet brerd brere brett breu- brrrr brud- brude brued bruer bruet brute btr-d btr-t bubbe buber budde buddu budur burde buret burru burte burtt burud burut buter butte butut ddddd debed deber debet debte debut dedde dedee deder dedur dedut deede deepe deepp deepu deere depbt depue derbe derde dered derpt derre derub derue deter detre dette detur deure deut- drdre dredd drede dreed dreep drepe drere drude drupe dubee duded duder duere duerr duete duett dueup duped duper durbe dured duree durer duret durre durte durtu dutte e-dee ebbed ebber ebbet ebert ebure edder eddre edere edred eeeee eeped eepee eerde epptb epure erbbe erber erdre erdut erede erept erere erred errtu erte erter erupt etete etree etter etude eturu eurre p-rep pebre pedee peebu peedu peere peert peete pepee peppe pept- pepup perde perdu perer peret perre perte perur petbe peter petr- petre petru pette petur peude peure prede prepd prete prude prute pter- ptere ptprb ptprd ptpre ptprr ptprt ptpru puber pudde puder pudur puett pupet puppe pured puree purer purre purte puter putre putt- putte puttu putup re-up rebbe reber rebet rebud rebut redbd redde reder redub redup redur reede reepe reere repet reppe reprt reptd repub reput rerde rere- reree reret reted retee reter rette reuer reuet reute rubee ruber