-er -up b-p b-u bbb bbe bbl bbp bbr bbt bbu be- beb bee bel bep ber bet beu blb ble bll blp blr blt blu bpb bpe bpl bpp bpr bpt bpu brb bre brl brp brr brt bru btb bte btl btp btr btt btu bub bue bul bup bur but buu ebb ebe ebl ebp ebr ebt ebu eeb eee eel eep eer eet elb ele ell elp elr elt elu ep- epb epe epl epp epr ept epu erb ere erl erp err ert eru etb ete etl etp etr ett etu eu- eub eue eul eup eur eut l-p lbb lbe lbl lbp lbr lbt lbu leb lee lel lep ler let leu llb lle lll llp llr llt llu lpb lpe lpl lpp lpr lpt lpu lrb lrp lrr lrt lru ltb lte ltl ltp ltr ltt ltu lub lue lul lup lur lut luu p-p pbb pbe pbl pbp pbr pbt pbu peb pee pel pep per pet peu plb ple pll plp plr plt plu ppb ppe ppl ppp ppr ppt ppu prb pre prl prp prr prt pru pt- ptb pte ptl ptp ptr ptt ptu pub pue pul pup pur put puu rbb rbe rbl rbp rbr rbt rbu re- reb ree rel rep rer ret reu rle rll rlp rlr rlt rlu rpb rpe rpl rpp rpr rpt rpu rrb rrl rrp rrr rrt rru rtb rte rtl rtp rtr rtt rtu rub rue rup rur rut ruu tbb tbe tbl tbp tbr tbt tbu te- teb tee tel tep ter tet teu tle tll tlp tlr tlt tlu tpb tpe tpl tpp tpr tpt tpu trb tre trl trp trr trt tru ttb tte ttl ttp ttr ttt ttu tub tue tul tup tur tut tuu ubb ube ubl ubp ubr ubt ubu ueb uee uel uep uer uet ulb ule ull ulp ulr ult ulu up- upb upe upp upr upt upu ur- urb ure url urp urr urt uru utb ute utl utp utr utt utu uue uur uut uuu

bbbb bbeb bbet bblb bbpr bebb bebe beeb beel beep beer beet bele bell belp belt belu bere berr bert beru bete bett betu beur blbt bleb blee blet bleu blub blue blup blur blut bpel breb bree brel brep brer bret brlp brrr brue brup brut btbp btlp btrt bttb bubb bube bubu buel buer bueu bulb bule bull bult bulu bur- burb bure burl burp burr burt buru but- bute butt ebbr ebel eber ebru ebul ebur eeee eele eete eetu el-b el-p elbe elbu elee eler elet elle ellu elpe elte elue elul epee eper eple epll eppp eprb eprp epte epub erbb erbe ereb erel erer eret erle erll erpe erre ertl ertu erub erur etbr etee etel eter etre ette ettu euer eule eur- eure eurt lblr lbrt le-u lebu leel leep leer leet lele lell lelu lepe lepp lept lere lerp lert lete lett leur llet lleu llll lppl lprp lptb lrpu lrrr ltbl ltee lttr lube luer lule lull lulu lupe lupu lure lurt lute luup pblu pebl peel peep peer peet pel- pelb pele pell pelt pelu pepe per- pere perl perp perr pert peru pete petr pett peul peur peut plbr ple- pleb plee plet pleu plpp pltt plue plup plur pper pple pppp ppru pptt ppur pre- preb pree prel prep pret preu prle prlr prtp prtr prue prut pruu ptbl pter pu-e pube publ pubu puel puer puet pueu pule pull pulp pult pulu pupe pupl pupu pur- purb pure purl purp purr puru put- pute putt putu rbbb rbbr rble rebb rebe rebu reeb reel reep reet relb rele rell relp relt repe repl repp repr rept repu rere rert reru rete retr rett reue reul reup reut reuu rlee rleu rpet rrle rrrr rtee rtle rtlt rttp rubb rube rubp rubu ruel ruer ruet rule rull rupe rupp rupt rure rurp ruru rute rutl rutt rutu tbrb tbtp tebu teel teer teet tel- tele tell telt telu tepe tepp tepu ter- tere terp terr teru tete tetr tett tetu teut tper tppp tppr tpte tptp tptr tput tre- tree tret treu trpe trpp trte trtr trub true trut truu ttbb tter tttt ttul tubb tube tubr tubu tuel tuer tuet tule tull tulp tulu tupe tupu turb ture turp turr turt turu tute tutl tutt tutu u-rp ubbe uber ubet uble uele uell uleb ulee ulle ullr ultt ulul upbe uplb uppe uppp uppu uptl upup urbe ure- uret urle urre urte urup urur urut utel utep uter uttu uulu uuuu

-tree bbbee be-er bebel beber beebe beele beete beeut belee belep belet bellb belle belue belur belut beppe beppu berbe berel beret berle berre berru berte betee betel beter betle betre bett- bette betul beuer beule beure beute bleep bleer bleet blere blerp blete bleue bluer bluet blurb blure blurr blurt brebu breel breer breet brell brere brett breu- brrrr bruer bruet brule brull brute btr-t bubbe buber buble buell bulb- bull- bulle bulul bulut burel buret burle burru burte burtt burut buter butle butte butut ebber ebbet ebble ebell eberl ebert eblul ebull ebure eeeee eeler eepee eleet elele eleut ellel eller ellet ellul elpee elper elulu eluru elute epptb epure erbbe erber erept erere erpel errtu erte ertel erter erupt etete etree ettel etter ettle eturu euell euler eurel eurre lebel leber lebet leell leere leert lelep leleu lelle lepel leper lepet leppe lepre lept- lerer letbe letre lette letup letur leupp lubbe luber luble lubur lulle lulte lulul luper luppe lupul lurer lurue lurup lute- luter lutte p-rep pebre peebu peele peell peere peerl peert peete pelee peler pelet pelle pepee pepel peple peppe pept- pepup perel perer peret perle perre perte perur petbe peter petr- petre petru pette petur peule peure plebe pleep pleet plete pleut plupp plut- plute prell prelp prepl prete prute pter- ptere ptprb ptpre ptprr ptprt ptpru puber puble puett puler pull- pulle pullu