-er -up a-a a-b a-c aaa aab aac aad aae aan aap aar aau ab- aba abb abc abd abe abn abp abr abu ac- aca acb acc acd ace acn acp acr acu ad- ada adb adc add ade adn adp adr adu aea aeb aec aed aee aen aep aer aeu an- ana anb anc and ane ann anp anr anu ap- apa apb apc apd ape apn app apr apu ar- ara arb arc ard are arn arp arr aru au- aua aub auc aud aue aun aup aur b-p b-u baa bab bac bad bae ban bap bar bau bba bbb bbc bbd bbe bbn bbp bbr bbu bca bcb bcc bcd bce bcn bcp bcr bcu bda bdb bdc bdd bde bdp bdr bdu be- bea beb bec bed bee ben bep ber beu bna bnb bnc bnd bne bnn bnp bnr bnu bpa bpb bpc bpd bpe bpn bpp bpr bpu bra brb brd bre brn brp brr bru bua bub buc bud bue bun bup bur buu c-- caa cab cac cad cae can cap car cau cba cbb cbc cbd cbe cbn cbp cbr cbu cca ccb ccc ccd cce ccn ccp ccr ccu cda cdb cdc cdd cde cdn cdp cdr cdu ce- cea ceb cec ced cee cen cep cer ceu cn- cna cnb cnc cnd cne cnn cnp cnr cnu cpa cpb cpc cpd cpe cpn cpp cpr cpu cra crb crc crd cre crn crp crr cru cua cub cuc cud cue cun cup cur cuu daa dab dac dad dae dan dap dar dau dba dbb dbc dbd dbe dbn dbp dbr dbu dca dcb dcc dcd dce dcn dcp dcr dcu dda ddb ddc ddd dde ddn ddp ddr ddu de- dea deb dec ded dee den dep der deu dna dnb dnc dnd dne dnn dnp dnr dpa dpb dpc dpd dpe dpn dpp dpr dpu dra drb drc drd dre drn drp drr dru dua dub duc dud due dun dup dur eaa eab eac ead eae ean eap ear eau eba ebb ebc ebd ebe ebn ebp ebr ebu ec- eca ecb ecc ecd ece ecn ecr ecu ed- eda edb edc edd ede edn edp edr edu eea eeb eec eed eee een eep eer en- ena enb enc end ene enn enp enr enu ep- epa epb epc epd epe epn epp epr epu era erb erc erd ere ern erp err eru eu- eua eub euc eud eue eun eup eur naa nab nac nad nae nan nap nar nau nba nbb nbc nbd nbe nbn nbp nbr nbu nca ncb ncc ncd nce ncn ncp ncr ncu nda ndb ndc ndd nde ndn ndp ndr ndu ne- nea neb nec ned nee nen nep ner neu nna nnb nnc nne nnn nnp nnu npa npb npc npd npe npn npp npr npu nra nrb nrc nrd nre nrn nrp nrr nru nua nub nuc nud nue nun nup nur nuu p-p paa pab pac pad pae pan pap par pau pba pbb pbc pbd pbe pbn pbp pbr pbu pca pcb pcc pcd pce pcn pcp pcr pcu pda pdb pdc pdd pde pdn pdp pdr pdu pea peb pec ped pee pen pep per peu pn- pna pnb pnc pnd pne pnn pnp pnr pnu ppa ppb ppc ppd ppe ppn ppp ppr ppu pra prb prc prd pre prn prp prr pru pua pub puc pud pue pun pup pur puu ra- raa rab rac rad rae ran rap rar rau rba rbb rbc rbd rbe rbn rbp rbr rbu rca rcb rcc rcd rce rcn rcp rcr rcu rda rdb rdc rdd rde rdn rdp rdr rdu re- rea reb rec red ree ren rep rer reu rna rnb rnc rnd rnn rnp rnr rnu rpa rpb rpc rpd rpe rpn rpp rpr rpu rra rrb rrc rrd rrn rrp rrr rru rua rub ruc rud rue run rup rur ruu ua- uaa uab uac uad uae uan uap uar uau uba ubb ubc ube ubn ubp ubr ubu uca ucb ucc ucd uce ucn ucp ucr ucu uda udb udc udd ude udn udp udr udu uea ueb uec ued uee uen uep uer un- una unb unc und une unn unp unr unu up- upa upb upc upd upe upn upp upr upu ur- ura urb urc urd ure urn urp urr uru uua uuc uue uun uur uuu