-up b-p b-u bbb bbc bbd bbn bbo bbp bbr bbu bcb bcc bcd bcn bco bcp bcr bcu bdb bdc bdd bdo bdp bdr bdu bnb bnc bnd bnn bno bnp bnr bnu bob boc bod bon boo bop bor bou bpb bpc bpd bpn bpo bpp bpr bpu brb brd brn bro brp brr bru bub buc bud bun buo bup bur buu c-- cbb cbc cbd cbn cbo cbp cbr cbu ccb ccc ccd ccn cco ccp ccr ccu cdb cdc cdd cdn cdo cdp cdr cdu cn- cnb cnc cnd cnn cno cnp cnr cnu co- cob coc cod con coo cop cor cou cpb cpc cpd cpn cpo cpp cpr cpu crb crc crd crn cro crp crr cru cub cuc cud cun cuo cup cur cuu dbb dbc dbd dbn dbo dbp dbr dbu dcb dcc dcd dcn dco dcp dcr dcu ddb ddc ddd ddn ddo ddp ddr ddu dnb dnc dnd dnn dno dnp dnr dob doc dod don doo dop dor dou dpb dpc dpd dpn dpo dpp dpr dpu drb drc drd drn dro drp drr dru dub duc dud dun duo dup dur nbb nbc nbd nbn nbo nbp nbr nbu ncb ncc ncd ncn nco ncp ncr ncu ndb ndc ndd ndn ndo ndp ndr ndu nnb nnc nnn nno nnp nnu no- nob noc nod non noo nop nor nou npb npc npd npn npo npp npr npu nrb nrc nrd nrn nro nrp nrr nru nub nuc nud nun nuo nup nur nuu ob- obb obc obd obn obo obp obr obu oc- ocb occ ocd ocn oco ocp ocr ocu odb odc odd odn odo odp odr odu on- onb onc ond onn ono onp onr onu oo- oob ooc ood oon ooo oop oor op- opb opc opd opn opo opp opr or- orb orc ord orn oro orp orr oru ou- ouc oud oun ouo oup our p-p pbb pbc pbd pbn pbo pbp pbr pbu pcb pcc pcd pcn pco pcp pcr pcu pdb pdc pdd pdn pdo pdp pdr pdu pn- pnb pnc pnd pnn pno pnp pnr pnu pob poc pod pon poo pop por pou ppb ppc ppd ppn ppo ppp ppr ppu prb prc prd prn pro prp prr pru pub puc pud pun pup pur puu rbb rbc rbd rbn rbo rbp rbr rbu rcb rcc rcd rcn rco rcp rcr rcu rdb rdc rdd rdn rdo rdp rdr rdu rnb rnc rnd rnn rno rnp rnr rnu rob roc rod ron roo rop ror rou rpb rpc rpd rpn rpo rpp rpr rpu rrb rrc rrd rrn rrp rrr rru rub ruc rud run ruo rup rur ruu ubb ubc ubn ubo ubp ubr ubu ucb ucc ucd ucn uco ucp ucr ucu udb udc udd udn udo udp udr udu un- unb unc und unn uno unp unr unu uob uoc uod uon uoo uop uor up- upb upc upd upn upo upp upr upu ur- urb urc urd urn uro urp urr uru uuc uun uur uuu

bbbb bbdd bbdo bbpr bbrc bcbc bcbp bccc bcnu bcor bcpp bcru bcuc bcup bd-r bdbc bddc bdpc bnoc bnor bnpp bnrr bobb bobo bobu boco bocu bodb bodo bodu bonc bond bonn bono bonu boob booc bood boon boop boor bopp bor- bord born boro borr boru boud boun boup bour bpcp bprc bprd brcb brdo brno brob broc brod bron broo bror brou brrr bruc brud brun brup bubb bubo bubu bucc buco bucu budb budd budo budu bunb bund bunn buno bunu buon bupc bur- burb burd burn buro burp burr buru c-bo c-cd cbbc cbcc cbcn cbcp cbcr cbcu cbdb cbdc cbdn cbdo cbnd cbpc cbpp cbrd cbrn ccbc ccbn cccb cccc cccp cccu ccdc ccdn ccdp ccdr ccnb ccnc ccnp ccnr ccnu ccob ccoc ccod ccpn ccpp ccpr ccrc ccrp ccuc ccup cd-r cddb cddr cdnb cdnc cdon cnbc cnbp cnco cncp cndd cndp cnrc cnrr cobb cobo cobu coco cocp cocu codd con- conc cond conn cono coob cood coon coop copd copo copp copr cor- corb corc cord corn coro corp corr coub coud coun coup cour cpbc cpcu cpnb cppd crbc crbu crcc crcr crdc crob croc crod cron croo crop cror crpc crub crud crun crup cub- cubb cucc cucn cund cuno cunp cuon cupo cupp cupr curb curd curn curo curr d-bo dbcc dbcp dbpc dbpd dbrn dcbc dccb dccc dccp dccu dcdb dcon dcop dcpo dcup dddd ddoc ddpo ddrc ddub dnoc dnpo dnrc dobb dobu doco docu dod- dodd dodo donc dond donn dono donp donr doob dood doon doop door dopo dopp dopr dorc dord dorn doro dorp dorr doru doub douc doud doun doup dour dpbc dpcp dppc drbc drno drob drod dron drop drou drub drup druu dub- dubb dubc dubu duco dudd dudo dudu dunc dunn duno duo- duon dupo durn duro duru duur n-up nbbc nbbo nbcc nbco nbpp ncbc nccc nccn nccp nccr nccu ncdc ncdn ncdr ncdu ncnc ncnd ncoc ncor ncpc ncrc ncrp ndcc ndcp nddb nddo ndnp ndoc ndop ndor ndpd ndpr ndrc nndb nnnn nnpr nobc nobo nobu noco nodo nodu non- nonn nono nonu noo- noob noon nooo noop noor nor- norb norc nord norn noro norr noun noup nour npcc nppc nppd nrdc nroc nron nrpc nrpn nrrc nrrd nubc nucu nudc nudd nudo nunc nunn nuno nuoc nuon nurc nurd nurn nurp nurr nuru obbo obon obor obro ocbc occc occn ocon ocpd ocpp ocro ocrr ocur odbo oddd odnb odon odoo odop odor odou odrp odur onc- oncd onco ondo onno onod onon onor onpu onup onur oocr oooo oord opo- opon opor oppo orbb orbo orbu orco ordn ordo ordu ornc orno oro- oron oror orpc orro orub orup oucc oudc oun- ound our- ourn ouro ouu- pbcc pboc pcbc pccc pcod pcpb pcpn pcpp pcrc pcrd pcun pdcp pdoc pdpn pdpr pdrc pnon pnpo pnpp pnro pnup pobo pocd