-er b-u bbb bbe bbl bbm bbr bbt bbu be- beb bee bel bem ber bet beu blb ble bll blm blr blt blu bmb bme bml bmm bmr bmt bmu brb bre brl brm brr brt bru btb bte btl btm btr btt btu bub bue bul bum bur but buu ebb ebe ebl ebm ebr ebt ebu eeb eee eel eem eer eet elb ele ell elm elr elt elu em- emb eme eml emm emr emt emu erb ere erl erm err ert eru etb ete etl etm etr ett etu eu- eub eue eul eur eut lbb lbe lbl lbm lbr lbt lbu leb lee lel lem ler let leu llb lle lll llm llr llt llu lmb lme lml lmm lmr lmt lmu lrb lrm lrr lrt lru ltb lte ltl ltm ltr ltt ltu lub lue lul lum lur lut luu m-r mbb mbe mbl mbm mbr mbt mbu meb mee mel mem mer met meu mlb mle mll mlm mlr mlt mlu mmb mme mml mmm mmr mmt mmu mrb mre mrl mrm mrr mrt mru mtb mte mtl mtm mtr mtt mtu mub mue mul mum mur mut muu rbb rbe rbl rbm rbr rbt rbu re- reb ree rel rem rer ret reu rle rll rlm rlr rlt rlu rmb rme rml rmm rmr rmt rrb rrl rrm rrr rrt rru rtb rte rtl rtm rtr rtt rtu rub rue rum rur rut ruu tbb tbe tbl tbm tbr tbt tbu te- teb tee tel tem ter tet teu tle tll tlm tlr tlt tlu tmb tme tml tmm tmr tmt tmu trb tre trl trm trr trt tru ttb tte ttl ttm ttr ttt ttu tub tue tul tum tur tut tuu ubb ube ubl ubr ubt ubu ueb uee uel uem uer uet ulb ule ull ulm ulr ult ulu um- umb ume uml umm umr umt umu ur- urb ure url urm urr urt uru utb ute utl utm utr utt utu uue uum uur uut uuu

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-tree bbbee be-er bebel beber beebe beele beete beeut belee belem belet bellb belle belue belum belur belut bembe bemer bemet berbe berel beret berle berme berre berru berte berum betee betel beter betle betre bett- bette betul beuer beule beure beute bleer bleet blere blete bleue bluer bluet blume blurb blure blurr blurt brebu breel breem breer breet brell breme bremm brere brett breu- brmmm brrrr bruer bruet brule brull brume brumm brute btr-t bubbe buber buble buell bulb- bull- bulle bulul bulut bumbu bumme burel buret burle burru burte burtt burut buter butle butme butte butut ebber ebbet ebble ebell eberl ebert eblul ebull ebure eeeee eeler eleet elele eleme eleut ellel eller ellet ellul elmer elmet elulu eluru elute embee embel ember emble embue emeer emele emell emere emerl emert emmer emmet emtee emtel emule emure erbbe erber erem- erere errtu erte ertel erter etete etree ettel etter ettle eturu euell euler eum-u eumel eurel eurre lebel leber lebet leell leeme leere leert leleu lelle lemel lemer lemme lemur lerer lerum letbe letem letme letre lette letur lmule lubbe luber luble lubur lulle lulte lulul lumb- lumbe lumer lumet lumle lumme lumut lurer lurue lute- luter lutte lutum m-tel mbebe mbere mbret mbube mbule mbulu mburu mebbe meble meele meell meemu meere meete melbu melee melem melet mell- melle melte melub melur melut membe memel memer merel merer meret merle merre merte merul merur metel meter metle metr- metre mette metur meuer meule meure meute mlete mmmmm mreru