-er c-- ccc cce cck ccr cct ccu ccz ce- cec cee cek cer cet ceu cez ckc ckt crc cre crk crr crt cru crz ctc cte ctk ctr ctt ctu ctz cuc cue cuk cur cut cuu cuz cz- czc cze czk czt ec- ecc ece eck ecr ect ecu eec eee eek eer eet ekc eke ekr ekt eku erc ere erk err ert eru erz etc ete etk etr ett etu etz eu- euc eue eur eut eze ezr ezz k-t k-z kcc kce kck kcr kct kcu ke- kec kee kek ker ket kez kkc kke kkk kkr kkt kku krc krk krr krt kru ktc kte ktk ktr ktt ktu kuc kue kuk kur kut kuu rcc rce rcr rct rcu re- rec ree rek rer ret reu rez rkc rke rkk rkt rku rkz rrc rrk rrr rrt rru rtc rte rtk rtr rtt rtu rtz ruc rue ruk rur rut ruu ruz rze tcc tce tck tcr tct tcu te- tec tee tek ter tet teu tez tkc tke tkk tkr tkt tkz trc tre trk trr trt tru trz ttc tte ttk ttr ttt ttu tuc tue tuk tur tut tuu tuz tze tzu ucc uce uck ucr uct ucu uec uee uer uet ukc uke ukk ukr uku ukz ur- urc ure urk urr urt uru urz utc ute utk utr utt utu utz uuc uue uur uut uuu uzu zce zec zee zek zer zet zez zte ztr zuc zuk zur zut zuz zzr zzt zzz

cccc cccu ccee ccrc ccre ccrt cctc cctt ccuc ccut cec- cece cect ceec ceke cer- cerc cere cert cet- cete ceze ckck cker ckrc crcc crce crcr crcz cre- crec cree cret creu crkc crrt crtc crue cruk crut cruz ctec ctrc cucc cuce cuck cuek cuer cuk- cuke cure curr curt cut- cutc cute cutt eccc ecce ecct ecrc ecrr ecru ect- ectc eeee eeke eerc eetc eete eetu eeze ekek eker eket ekur ercc erce erec erer eret erez erke errc erre ertu ertz eruc erur etcc etec etee eter etre ette ettu etuz euer eur- eurc eure eurt ezek ezer ezuz kccc kcck kccr kcct kccu kcec kcee kcet kceu kcez kckc kckk kckr kckz kcrc kcrr kcrt kcru kcrz kctc kcte kctu kctz kcue kcuk kcuz kcze kczz keck kecr keek keer keet kekc keke keku ker- kerc kere kerk kerr kert keru kerz ket- ketc kete ketk ketr kett ketu keur keze kezr kezz kkck kkcr kkct kkez kkkk kkrc kkre kkrk kkrr kkrt kkrz kktc kktk kktu kktz kkut kkuu kkzu kkzz krcc krce krcu krec kree krek kret kreu krez krkc krke krkk krkr krku krkz krrc krre krrk krrr krrt krrz krtc krtk krtr krtz kruc krue kruk krur kruz krze krzk krzr krzz ktcc ktce ktck ktcr ktec ktee ktek ktez ktkc ktke ktkk ktkr ktkt ktku ktkz ktrc ktre ktrk ktrr ktrt ktru ktrz kttc kttk kttr kttt kttu kttz ktuc ktuz ktzk ktzr ktzt ktzu ktzz kucc kuce kucr kuek kueu kuke kukk kuku kure kurk kurr kurt kuru kurz kute kutr kutt kutu kutz kuuk kuur kuuu kuuz kuze kuzu kuzz kzcr kzee kzer kzke kzkr kzkz kzrc kzrk kzrr kzrz kztk kzue kzuu kzuz kzzk kzzr kzzt kzzz rccc rcet rctc recc rece reck recr rect recu recz reek reet reke rekt rere rert reru rete retr rett retz reue reuk reut reuu reze rezu rrrr rtcc rtce rtee ruce ruck ruct ruer ruet ruez ruke rukk ruku rurc rure ruru rute rutt rutu ruze tccc tccu tctc teck tecr tect teec teek teer teet teez teke ter- terc tere terk terr teru tete tetr tett tetu tetz teuk teut tezu tezz trcc tre- trec tree trek tret treu trez trtc trte trtr truc true truk trut truu tter tttt tucc tuck tuer tuet tuke turc ture turk turr turt turu tute tutt tutu tuzk tuzu tuzz tzuk tzur tzut tzzt ucrc ucut uetz ukcc ukek ukeu ukrc ukur ure- uret urke urre urte uruk urur urut uruz utec uter uttu uuuu uzer zctu zeck zeek zeke zekr zeku zerk zert zete zeze zrce zrze zuce zuck zuke zukr zurr zuru zuuk zuzu zzzz

-tree c-tec ccccc ccett ceere cerc- cerce cerec cerer ceret cerke cerre certe cette crece creek creer creke crete cretu creu- creue cruce cruck cruet cruke crure cruze ctree cttee cucuk cuker curce curer curet curre cutcu cutee cuter ecczt ecker eecke eeeee ekker ekuku ekuru erect erere eretz erkec errtu erte erter eruct eruke eteke etete etree etrek etter eturu eucre eurre euzet k-ute kecer keere kekec kerek keret kerre kertu ketek keter kette kreek kreke krete kretz kreuk kreuz krucz kucer kucuk kukec kukur kurek kurku kurre kurte kurtz kuruc kuruk kurze kutte kuttu kutur recce recet recke rect- recte recue recur recut reece reere reetz reeze rekke rere- reree reret rerez retee reter rette reuer reuet reute reuze rezek rt-rk rucer ruere ruete ruetz rukke rurec ruter rutte ruutu rzeck tcutk teket tekke terce terek teret tereu terre tert- teter tetr- tette tkzee treck treer treet trere trete trett treut truce truck truer truke trute trzec trzek ttttt tucet tucke tuctu tucze tukur turck turcz turek turet turku turre turtu turut turze tutee tutku tutte tuuru tzere tzute u-cee uceku uetze ukeke ukert urker urkut urter uruce urucu urutu urzut uter- utter uttur uturu uuuuu uzere z-ter z-urc zerre zeuet zu-zu zucer zucre zuker zurek zzzzz

ceecee cerete ceruce creeke creete creeze creket curete currer curret curter cutcut cuttee cutter czerce eckert eerect erketu errett etcetc etrez ettutu eutere k-tree keeker kekkut kereru kerker kerkuk kertee ketter ketuke keuruu kreker krekez kretek kreutz krezce krueck krzucz kucerz kuczek kukere kurcze kurkcu kurree kurucz kururu kutke kutter kuzucu r-tree recrue recuer recure recurt reeker rekrut retece reteer reteet retere retree retret retter rettur returu reuere reuter reutte rucker rukutu rurkee rurutu ruttee rutter t-tree teetee teeter teeuck tekrur tercer tercet terete terrer terret