-er -up a-a a-b a-c aaa aab aac aad aae aan aao aap aar aau ab- aba abb abc abd abe abn abo abp abr abu ac- aca acb acc acd ace acn aco acp acr acu ad- ada adb adc add ade adn ado adp adr adu aea aeb aec aed aee aen aeo aep aer aeu an- ana anb anc and ane ann ano anp anr anu aoa aob aoc aod aoe aon aoo aop aor aou ap- apa apb apc apd ape apn apo app apr apu ar- ara arb arc ard are arn aro arp arr aru au- aua aub auc aud aue aun auo aup aur b-p b-u baa bab bac bad bae ban bao bap bar bau bba bbb bbc bbd bbe bbn bbo bbp bbr bbu bca bcb bcc bcd bce bcn bco bcp bcr bcu bda bdb bdc bdd bde bdo bdp bdr bdu be- bea beb bec bed bee ben beo bep ber beu bna bnb bnc bnd bne bnn bno bnp bnr bnu boa bob boc bod boe bon boo bop bor bou bpa bpb bpc bpd bpe bpn bpo bpp bpr bpu bra brb brd bre brn bro brp brr bru bua bub buc bud bue bun buo bup bur buu c-- caa cab cac cad cae can cao cap car cau cba cbb cbc cbd cbe cbn cbo cbp cbr cbu cca ccb ccc ccd cce ccn cco ccp ccr ccu cda cdb cdc cdd cde cdn cdo cdp cdr cdu ce- cea ceb cec ced cee cen ceo cep cer ceu cn- cna cnb cnc cnd cne cnn cno cnp cnr cnu co- coa cob coc cod coe con coo cop cor cou cpa cpb cpc cpd cpe cpn cpo cpp cpr cpu cra crb crc crd cre crn cro crp crr cru cua cub cuc cud cue cun cuo cup cur cuu daa dab dac dad dae dan dao dap dar dau dba dbb dbc dbd dbe dbn dbo dbp dbr dbu dca dcb dcc dcd dce dcn dco dcp dcr dcu dda ddb ddc ddd dde ddn ddo ddp ddr ddu de- dea deb dec ded dee den deo dep der deu dna dnb dnc dnd dne dnn dno dnp dnr doa dob doc dod doe don doo dop dor dou dpa dpb dpc dpd dpe dpn dpo dpp dpr dpu dra drb drc drd dre drn dro drp drr dru dua dub duc dud due dun duo dup dur eaa eab eac ead eae ean eao eap ear eau eba ebb ebc ebd ebe ebn ebo ebp ebr ebu ec- eca ecb ecc ecd ece ecn eco ecr ecu ed- eda edb edc edd ede edn edo edp edr edu eea eeb eec eed eee een eeo eep eer en- ena enb enc end ene enn eno enp enr enu eo- eoa eob eoc eod eoe eon eoo eop eor eou ep- epa epb epc epd epe epn epo epp epr epu era erb erc erd ere ern ero erp err eru eu- eua eub euc eud eue eun eup eur naa nab nac nad nae nan nao nap nar nau nba nbb nbc nbd nbe nbn nbo nbp nbr nbu nca ncb ncc ncd nce ncn nco ncp ncr ncu nda ndb ndc ndd nde ndn ndo ndp ndr ndu ne- nea neb nec ned nee nen neo nep ner neu nna nnb nnc nne nnn nno nnp nnu no- noa nob noc nod noe non noo nop nor nou npa npb npc npd npe npn npo npp npr npu nra nrb nrc nrd nre nrn nro nrp nrr nru nua nub nuc nud nue nun nuo nup nur nuu oaa oab oac oad oae oan oao oap oar oau ob- oba obb obc obd obe obn obo obp obr obu oc- oca ocb occ ocd ocn oco ocp ocr ocu oda odb odc odd ode odn odo odp odr odu oea oeb oec oed oee oen oeo oep oer on- ona onb onc ond one onn ono onp onr onu oo- ooa oob ooc ood oon ooo oop oor op- opa opb opc opd ope opn opo opp opr or- ora orb orc ord ore orn oro orp orr oru ou- oua ouc oud oue oun ouo oup our p-p paa pab pac pad pae pan pao pap par pau pba pbb pbc pbd pbe pbn pbo pbp pbr pbu pca pcb pcc pcd pce pcn pco pcp pcr pcu pda pdb pdc pdd pde pdn pdo pdp pdr pdu pea peb pec ped pee pen peo pep per peu pn- pna pnb pnc pnd pne pnn pno pnp pnr pnu poa pob poc pod poe pon poo pop por pou ppa ppb ppc ppd ppe ppn ppo ppp ppr ppu pra prb prc prd pre prn pro prp prr pru pua pub puc pud pue pun pup pur puu ra- raa rab rac rad rae ran rao rap rar rau rba rbb rbc rbd rbe rbn rbo rbp rbr rbu rca rcb rcc rcd rce rcn rco rcp rcr rcu rda rdb rdc rdd rde rdn rdo rdp rdr rdu re- rea reb rec red ree ren reo rep rer reu rna rnb rnc rnd rnn rno rnp rnr rnu roa rob roc rod roe ron roo rop ror rou rpa rpb rpc rpd rpe rpn rpo rpp rpr rpu rra rrb rrc rrd rrn rrp rrr rru rua rub ruc rud rue run ruo rup rur ruu ua- uaa uab uac uad uae uan uao uap uar uau uba ubb ubc ube ubn ubo ubp ubr ubu uca ucb ucc ucd uce ucn uco ucp ucr ucu uda udb udc udd ude udn udo udp udr udu uea ueb uec ued uee uen uep uer un- una unb unc und une unn uno unp unr unu uoa uob uoc uod uoe uon uoo uop uor up- upa upb upc upd upe upn upo upp upr upu ur- ura urb urc