-er -up b-p b-u bbb bbc bbe bbo bbp bbr bbu bcb bcc bce bco bcp bcr bcu be- beb bec bee beo bep ber beu bob boc boe boo bop bor bou bpb bpc bpe bpo bpp bpr bpu brb bre bro brp brr bru bub buc bue buo bup bur buu c-- cbb cbc cbe cbo cbp cbr cbu ccb ccc cce cco ccp ccr ccu ce- ceb cec cee ceo cep cer ceu co- cob coc coe coo cop cor cou cpb cpc cpe cpo cpp cpr cpu crb crc cre cro crp crr cru cub cuc cue cuo cup cur cuu ebb ebc ebe ebo ebp ebr ebu ec- ecb ecc ece eco ecr ecu eeb eec eee eeo eep eer eo- eob eoc eoe eoo eop eor eou ep- epb epc epe epo epp epr epu erb erc ere ero erp err eru eu- eub euc eue eup eur ob- obb obc obe obo obp obr obu oc- ocb occ oco ocp ocr ocu oeb oec oee oeo oep oer oo- oob ooc ooo oop oor op- opb opc ope opo opp opr or- orb orc ore oro orp orr oru ou- ouc oue ouo oup our p-p pbb pbc pbe pbo pbp pbr pbu pcb pcc pce pco pcp pcr pcu peb pec pee peo pep per peu pob poc poe poo pop por pou ppb ppc ppe ppo ppp ppr ppu prb prc pre pro prp prr pru pub puc pue pup pur puu rbb rbc rbe rbo rbp rbr rbu rcb rcc rce rco rcp rcr rcu re- reb rec ree reo rep rer reu rob roc roe roo rop ror rou rpb rpc rpe rpo rpp rpr rpu rrb rrc rrp rrr rru rub ruc rue ruo rup rur ruu ubb ubc ube ubo ubp ubr ubu ucb ucc uce uco ucp ucr ucu ueb uec uee uep uer uob uoc uoe uoo uop uor up- upb upc upe upo upp upr upu ur- urb urc ure uro urp urr uru uuc uue uur uuu

bbbb bbeb bbpr bbrc bcbc bcbp bccc bcec bcer bcor bcpp bcru bcuc bcup bebb bebe bebo becu beeb beep beer beo- beor bepo berc bere bero berr beru beur bobb bobe bobo bobu boce boco bocu boec boee boeo boep boer boob booc booe boop boor bope bopp bor- bore boro borr boru boue boup bour bpcp bpoe bprc brcb brce breb brec bree breo brep brer brob broc broe broo bror brou brrr bruc brue brup bubb bube bubo bubu bucc buce buco bucu buer bueu bupc bur- burb bure buro burp burr buru c-bo cbbc cbcc cbce cbcp cbcr cbcu cbec cbee cber cbpc cbpp cbre ccbc cccb cccc cccp cccu ccee ccob ccoc ccpe ccpp ccpr ccrc ccre ccrp ccuc ccup cebp cebu cec- cece ceco cecp ceeb ceec ceop ceor ceou cepc cepe cepo cepp cepr cer- cerc cere cero cerp cobb cobe cobo cobu coce coco cocp cocu coep coob coop cope copo copp copr cor- corb corc core coro corp corr coub coue coup cour cpbc cpce cpcu cpeb cpep cper cpre crbc crbu crcc crce crcr cre- creb crec cree creo crep creu crob croc croe croo crop cror crpc crub crue crup cub- cubb cube cucc cuce cuer cupe cupo cupp cupr curb cure curo curr ebbc ebbo ebbr ebcc eber eboe eboo ebor ebpo ebro ebru ebur ecbc ecbe eccb eccc ecce ecco eco- ecop ecou ecpp ecrc ecrr ecru eeee eeoc eerc eero eore epcc epec epee eper epoc epor eppc eppo eppp eprb epro eprp epub erbb erbe ercc erce ercp ereb erec erer erob eroc eroe eroo erpe errc erre erro erub eruc erur eubc euer eur- eurc eure euro o-eo obbo obec ober oboe obor obre obro ocbc occc oce ocee ocpp ocre ocro ocrr ocur oec- oecc oeec oere oobe oocr ooer oooo oore opec opep oper opo- opor oppo orbb orbe orbo orbu orce orco ore- oreb orec oreo orer oro- oroe oror orpc orpe orro orub orup oucc ouer oupe our- oure ouro ouu- pbcc pboc pcbc pccc pcce pcep pcer pcoe pcpb pcpp pcrc pcre pece peco pecr peec peep peer peor peou pepe pepo per- perc pere pero perp perr peru peur pobo poce poco poer poop poor pop- popc pope popo popp porb porc pore poro porr poup pour ppcc pper pppo pppp pprc ppru ppur prbc prcc prcp pre- preb prec pree prep preu pro- prob proc proe proo prop prou prue pruu pu-e pube pubu puce pueo puer pueu pupe pupu pur- purb pure puro purp purr puru puuc rbbb rbbr rcbc rcbo rccb rccc rcep rcpo rebb rebe rebo rebu recc rece recp recr recu reeb reep reop reou repe repo repp repr repu rere rero reru reue reup reuu rob- robb robe robo robu rocc roce roco roer roob roop roor rope ropo rorc rore roro roru roub roue roup rpob rpoe rrrr rubb rube rubp rubu ruce ruer rupe rupp rurc rure ruro rurp ruru u-rp ubbe ubbo uber uboc ubpc ucbc uccp ucpb ucrc uocc uor- uore upbe upor uppc uppe uppp uppu upup urbe ure- uro- uroo urpo urre urup urur uucp uuoc uuuu

bbbee bccup be-er be-ro beber bebop becco becue beebe beour bepop beppe beppo beppu berbe bercu berec berob beroe beror berre berru beuer beure bo-bo boboc bobr bobre bobup bocce bocor boece boero boeur booce booco booer boore booru borbo borce borec boree borer boro- boroo borou borre borro borup bouce bouee bouer boure brebu brece breer breo- breoc brere breu- brobo broce broer broue brrrr bruce bruer bubbe buber bucco buceo bucur burcu buroo burro burru buruc c-cor c-p-c c-pop ccccc cebec ceber cebpb cebpe ceco- ceere ceoce ceoor ceppo cerbu cerc- cerce cerco cerec cerer cero- ceroc cerou cerre cerro co-bo co-co co-op cobbe cobre cobue cocc- cocce cocco coceo cocur coepe coeur cooee cooer coope coore copce copec coper coppe coppo copr-