-er -up b-p b-u bbb bbc bbd bbe bbk bbn bbo bbp bbr bbu bcb bcc bcd bce bck bcn bco bcp bcr bcu bdb bdc bdd bde bdk bdo bdp bdr bdu be- beb bec bed bee bek ben beo bep ber beu bkb bkc bke bkk bkn bko bkp bkr bnb bnc bnd bne bnk bnn bno bnp bnr bnu bob boc bod boe bok bon boo bop bor bou bpb bpc bpd bpe bpn bpo bpp bpr bpu brb brd bre brk brn bro brp brr bru bub buc bud bue buk bun buo bup bur buu c-- cbb cbc cbd cbe cbk cbn cbo cbp cbr cbu ccb ccc ccd cce cck ccn cco ccp ccr ccu cdb cdc cdd cde cdk cdn cdo cdp cdr cdu ce- ceb cec ced cee cek cen ceo cep cer ceu ckb ckc ckd cko cn- cnb cnc cnd cne cnn cno cnp cnr cnu co- cob coc cod coe cok con coo cop cor cou cpb cpc cpd cpe cpk cpn cpo cpp cpr cpu crb crc crd cre crk crn cro crp crr cru cub cuc cud cue cuk cun cuo cup cur cuu dbb dbc dbd dbe dbk dbn dbo dbp dbr dbu dcb dcc dcd dce dck dcn dco dcp dcr dcu ddb ddc ddd dde ddk ddn ddo ddp ddr ddu de- deb dec ded dee dek den deo dep der deu dkb dkc dke dkk dko dkp dkr dku dnb dnc dnd dne dnk dnn dno dnp dnr dob doc dod doe dok don doo dop dor dou dpb dpc dpd dpe dpk dpn dpo dpp dpr dpu drb drc drd dre drk drn dro drp drr dru dub duc dud due duk dun duo dup dur ebb ebc ebd ebe ebk ebn ebo ebp ebr ebu ec- ecb ecc ecd ece eck ecn eco ecr ecu ed- edb edc edd ede edk edn edo edp edr edu eeb eec eed eee eek een eeo eep eer ekb ekc ekd eke eko ekp ekr eku en- enb enc end ene enk enn eno enp enr enu eo- eob eoc eod eoe eok eon eoo eop eor eou ep- epb epc epd epe epn epo epp epr epu erb erc erd ere erk ern ero erp err eru eu- eub euc eud eue eun eup eur kbb kbc kbd kbe kbk kbn kbo kbp kbr kbu kcb kcc kcd kce kck kcn kcp kcr kcu kdb kdc kde kdk kdo kdp kdr kdu ke- keb kec ked kee kek ken keo kep ker kkb kkc kke kkk kkn kkp kkr kku kn- knc knd kne knk knn kno knp knr knu kob koc kod koe kok kon koo kop kor kou kpc kpd kpe kpk kpn kpo kpp kpr kpu krc krd krk krn kro krp krr kru kub kuc kud kue kuk kun kup kur kuu nbb nbc nbd nbe nbk nbn nbo nbp nbr nbu ncb ncc ncd nce nck ncn nco ncp ncr ncu ndb ndc ndd nde ndk ndn ndo ndp ndr ndu ne- neb nec ned nee nek nen neo nep ner neu nkc nke nkk nkn nko nkp nkr nku nnb nnc nne nnk nnn nno nnp nnu no- nob noc nod noe nok non noo nop nor nou npb npc npd npe npn npo npp npr npu nrb nrc nrd nre nrk nrn nro nrp nrr nru nub nuc nud nue nuk nun nuo nup nur nuu ob- obb obc obd obe obk obn obo obp obr obu oc- ocb occ ocd ock ocn oco ocp ocr ocu odb odc odd ode odn odo odp odr odu oeb oec oed oee oen oeo oep oer okb okc okd oke okk oko okp okr oku on- onb onc ond one onk onn ono onp onr onu oo- oob ooc ood ook oon ooo oop oor op- opb opc opd ope opk opn opo opp opr or- orb orc ord ore ork orn oro orp orr oru ou- ouc oud oue ouk oun ouo oup our p-p pbb pbc pbd pbe pbk pbn pbo pbp pbr pbu pcb pcc pcd pce pck pcn pco pcp pcr pcu pdb pdc pdd pde pdk pdn pdo pdp pdr pdu peb pec ped pee pek pen peo pep per peu pkb pkc pkd pke pkn pko pkp pkr pku pn- pnb pnc pnd pne pnk pnn pno pnp pnr pnu pob poc pod poe pok pon poo pop por pou ppb ppc ppd ppe ppk ppn ppo ppp ppr ppu prb prc prd pre prk prn pro prp prr pru pub puc pud pue puk pun pup pur puu rbb rbc rbd rbe rbk rbn rbo rbp rbr rbu rcb rcc rcd rce rcn rco rcp rcr rcu rdb rdc rdd rde rdn rdo rdp rdr rdu re- reb rec red ree rek ren reo rep rer reu rkb rkc rke rkk rko rkp rku rnb rnc rnd rnn rno rnp rnr rnu rob roc rod roe rok ron roo rop ror rou rpb rpc rpd rpe rpk rpn rpo rpp rpr rpu rrb rrc rrd rrk rrn rrp rrr rru rub ruc rud rue ruk run ruo rup rur ruu ubb ubc ube ubk ubn ubo ubp ubr ubu ucb ucc ucd uce uck ucn uco ucp ucr ucu udb udc udd ude udk udn udo udp udr udu ueb uec ued uee uen uep uer ukb ukc uke ukk ukn ukp ukr uku un- unb unc und une unk unn uno unp unr unu uob uoc uod uoe uok uon uoo uop uor up- upb upc upd upe upk upn upo upp upr upu ur- urb urc urd ure urk urn uro urp urr uru uuc uue uun uur uuu