-er -th bbb bbc bbe bbh bbo bbr bbt bcb bcc bce bch bco bcr bct be- beb bec bee beh beo ber bet bhb bhc bhe bhh bho bhr bht bob boc boe boh boo bor bot brb bre brh bro brr brt btb btc bte bth bto btr btt c-- cbb cbc cbe cbh cbo cbr cbt ccb ccc cce cch cco ccr cct ce- ceb cec cee ceh ceo cer cet ch- chb chc che chh cho chr cht co- cob coc coe coh coo cor cot crb crc cre crh cro crr crt ctb ctc cte cth cto ctr ctt ebb ebc ebe ebh ebo ebr ebt ec- ecb ecc ece ech eco ecr ect eeb eec eee eeo eer eet ehb ehc ehe ehh eho ehr eht eo- eob eoc eoe eoh eoo eor eot erb erc ere erh ero err ert etb etc ete eth eto etr ett hbb hbc hbe hbh hbo hbr hbt hcb hcc hce hch hco hcr hct he- heb hec hee heh heo her het hhb hhc hhe hhh hho hhr hht hob hoc hoe hoh hoo hor hot hr- hrb hrc hre hrh hro hrr hrt htb htc hte hth hto htr htt ob- obb obc obe obh obo obr obt oc- ocb occ och oco ocr oct oeb oec oee oeh oeo oer oet ohc ohe ohh oho ohr oht oo- oob ooc ooh ooo oor oot or- orb orc ore orh oro orr ort ot- otb otc ote oth oto otr ott rbb rbc rbe rbh rbo rbr rbt rcb rcc rce rch rco rcr rct re- reb rec ree reh reo rer ret rh- rhb rhc rhe rhh rho rhr rht rob roc roe roh roo ror rot rrb rrc rrh rrr rrt rtb rtc rte rto rtr rtt tbb tbc tbe tbh tbo tbr tbt tcb tcc tce tch tco tcr tct te- teb tec tee teh teo ter tet th- thb thc the thh tho thr tht to- tob toc toe toh too tor tot trb trc tre trh tro trr trt ttb ttc tte tth tto ttr ttt

bbbb bbch bbeb bbet bbrc bcbc bccc bcec bcer bcet bche bcor bctc bebb bebe bebo bech beeb beer beet behr beo- beor beot berc bere bero berr bert betc bete beth beto bett bhcc bher bhet bhor bhot bhrt bobb bobe bobo boce boch boco boec boee boeo boer boet boho bohr boht boob booc booe booh boor boot bor- bore borh boro borr bort botb bote both boto bott brcb brce breb brec bree breo brer bret brob broc broe broh broo bror brot brrr brtc btcc btec btob btor btrc btrt bttb c-bo cbbc cbcc cbce cbcr cbct cbec cbee cber cbet cbot cbre cbrh cbrt cbtc ccbc cccb cccc ccee cche cchr ccob ccoc ccrc ccre ccrt cctb cctc cctt cec- cece ceco cect ceeb ceec ceor cer- cerc cere cero cert cet- cete ceto chce chch cheb chec chee cheh cher chet choc choh choo chor chrb chrc chro chrr chrt chto chtr chtt cobb cobe cobh cobo coce coch coco coct coho coob cooh coot cor- corb corc core coro corr cort cotb cotc cote coth coto cott crbc crcc crce crcr cre- creb crec cree creh creo cret crob croc croe croh croo cror crot crrt crtc ctec ctor ctot ctrc ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecct eche echo echt eco- ecot ecrc ecrr ect- ectc ecth ecto eeee eeoc eerc eero eetc eete eeth ehcc eheh eher ehre ehte eore eotc eoto erbb erbe ercc erce erch ereb erec erer eret erhc erob eroc eroe eroo errc erre erro erth etbc etbr etcc etch etco etec etee eter eth- ethe etho etoe etoh etre etro ette etto hboc hcbc hccb hccc hcch hebb hebe hebo hebr hech hect heeb heer heet hehe heho heor herb herc here hero herr hert hete heth heto hett hhhh hobe hobo hoce hoch hocr hoer hohe hoho hooe hoor hoot horc hore horo horr hort hotb hote hoth hoto hotr hott hree hrob hrrc hrtb hrte htcc htet htoh httr o-eo obbo obec ober obet oboe obor obot obre obrh obro ocbc occc occt oce ocee ocet oche ocht ocre ocro ocrr oct- octe octo oec- oecc oeec oere ohbe ohcc ohee oher ohho ohob ohoh ohre ohte ohto oobe oocr ooer ooho oooh oooo oore oort ootb orbb orbe orbo orce orch orco ore- oreb orec oreh oreo orer orhe oro- oroe oror orot orro ortc orte orth orto otee oter othe otho othr oto- otoe otoh otoo otor otre otro otte otto rbbb rbbr rboh rcbc rcbo rccb rccc rcet rchb rctc rebb rebe rebo recc rece rech recr rect reeb reet rehb rehe reht reot rere rero rert rete reth reto retr rett rhce rheb rhee rheo rhet rhob rhoc rhoh rob- robb robe robo robt rocc roce roch roco roer roet rohe rohr roob roor root rorc rore roro rort rotc rote roth roto rotr rott rrrr rtcc rtce rtee tbcb tbcc tbce tbrb tccc tch- tche tchh tcho tchr tctc tebo tech teco tecr tect teec teer teet teho tehr teoh teor ter- terc tere tero terr tete teth teto tetr tett thch the- theb thec thee theo ther thet thoe thoo thor thot thre thro thtb thtr tobe tobo tobt toce toch toco toee toeh toer toet toho tooh toor toot torc tore toro torr tort totc tote toth toto totr tott trcc tre- trec tree treo tret troc troe troo trot trtc trte trtr ttbb tteo tter ttoe tttt

-tree bbbee be-er be-ro beber bebot becco beche becho beebe beech beete beeth beher behet behot beote beoth berbe berec bereh beret berhe berob beroe beror berre berte berth berto betch betee beter bethe betoo betor betre bett- bette betto bheer bhoot bhore bhtec bo-bo bo-ho bobet boboc bobr bobre bocce bocet boche bocho