-er -up a-a a-b a-c aaa aab aac aad aae aao aap aar aas aau ab- aba abb abc abd abe abo abp abr abs abu ac- aca acb acc acd ace aco acp acr acs acu ad- ada adb adc add ade ado adp adr ads adu aea aeb aec aed aee aeo aep aer aes aeu aoa aob aoc aod aoe aoo aop aor aos aou ap- apa apb apc apd ape apo app apr aps apu ar- ara arb arc ard are aro arp arr ars aru as- asa asb asc asd ase aso asp asr ass asu au- aua aub auc aud aue auo aup aur aus b-p b-u baa bab bac bad bae bao bap bar bas bau bba bbb bbc bbd bbe bbo bbp bbr bbs bbu bca bcb bcc bcd bce bco bcp bcr bcs bcu bda bdb bdc bdd bde bdo bdp bdr bds bdu be- bea beb bec bed bee beo bep ber bes beu boa bob boc bod boe boo bop bor bos bou bpa bpb bpc bpd bpe bpo bpp bpr bps bpu bra brb brd bre bro brp brr brs bru bsa bsb bsc bsd bse bso bsp bsr bss bsu bua bub buc bud bue buo bup bur bus buu c-- caa cab cac cad cae cao cap car cas cau cba cbb cbc cbd cbe cbo cbp cbr cbs cbu cca ccb ccc ccd cce cco ccp ccr ccs ccu cda cdb cdc cdd cde cdo cdp cdr cds cdu ce- cea ceb cec ced cee ceo cep cer ces ceu co- coa cob coc cod coe coo cop cor cos cou cpa cpb cpc cpd cpe cpo cpp cpr cps cpu cra crb crc crd cre cro crp crr crs cru csa csb csc csd cse cso csp csr css csu cua cub cuc cud cue cuo cup cur cus cuu daa dab dac dad dae dao dap dar das dau dba dbb dbc dbd dbe dbo dbp dbr dbs dbu dca dcb dcc dcd dce dco dcp dcr dcs dcu dda ddb ddc ddd dde ddo ddp ddr dds ddu de- dea deb dec ded dee deo dep der des deu doa dob doc dod doe doo dop dor dos dou dpa dpb dpc dpd dpe dpo dpp dpr dps dpu dra drb drc drd dre dro drp drr drs dru dsa dsb dsc dsd dse dso dsp dsr dss dsu dua dub duc dud due duo dup dur dus eaa eab eac ead eae eao eap ear eas eau eba ebb ebc ebd ebe ebo ebp ebr ebs ebu ec- eca ecb ecc ecd ece eco ecr ecs ecu ed- eda edb edc edd ede edo edp edr eds edu eea eeb eec eed eee eeo eep eer ees eo- eoa eob eoc eod eoe eoo eop eor eos eou ep- epa epb epc epd epe epo epp epr eps epu era erb erc erd ere ero erp err ers eru es- esa esb esc esd ese eso esp esr ess esu eu- eua eub euc eud eue eup eur eus oaa oab oac oad oae oao oap oar oas oau ob- oba obb obc obd obe obo obp obr obs obu oc- oca ocb occ ocd oco ocp ocr ocs ocu oda odb odc odd ode odo odp odr ods odu oea oeb oec oed oee oeo oep oer oes oo- ooa oob ooc ood ooo oop oor oos op- opa opb opc opd ope opo opp opr ops or- ora orb orc ord ore oro orp orr ors oru os- osa osb osc osd ose oso osp osr oss osu ou- oua ouc oud oue ouo oup our ous p-p paa pab pac pad pae pao pap par pas pau pba pbb pbc pbd pbe pbo pbp pbr pbs pbu pca pcb pcc pcd pce pco pcp pcr pcs pcu pda pdb pdc pdd pde pdo pdp pdr pds pdu pea peb pec ped pee peo pep per pes peu poa pob poc pod poe poo pop por pos pou ppa ppb ppc ppd ppe ppo ppp ppr pps ppu pra prb prc prd pre pro prp prr prs pru ps- psa psb psc psd pse pso psp psr pss psu pua pub puc pud pue pup pur pus puu ra- raa rab rac rad rae rao rap rar ras rau rba rbb rbc rbd rbe rbo rbp rbr rbs rbu rca rcb rcc rcd rce rco rcp rcr rcs rcu rda rdb rdc rdd rde rdo rdp rdr rds rdu re- rea reb rec red ree reo rep rer res reu roa rob roc rod roe roo rop ror ros rou rpa rpb rpc rpd rpe rpo rpp rpr rps rpu rra rrb rrc rrd rrp rrr rrs rru rsa rsb rsc rsd rse rso rsp rsr rss rsu rua rub ruc rud rue ruo rup rur rus ruu saa sab sac sad sae sao sap sar sas sau sba sbb sbc sbd sbe sbo sbp sbr sbs sbu sca scb scc scd sce sco scp scr scs scu sda sdb sdc sdd sde sdo sdp sdr sds sdu se- sea seb sec sed see seo sep ser ses seu soa sob soc sod soe soo sop sor sos sou spa spb spc spd spe spo spp spr sps spu sr- sra srb src srd sre sro srp srr srs ss- ssa ssb ssc ssd sse sso ssp ssr sss ssu sua sub suc sud sue suo sup sur sus suu ua- uaa uab uac uad uae uao uap uar uas uau uba ubb ubc ube ubo ubp ubr ubs ubu uca ucb ucc ucd uce uco ucp ucr ucs ucu uda udb udc udd ude udo udp udr uds udu uea ueb uec ued uee uep uer ues uoa uob uoc uod uoe uoo uop uor uos up- upa upb upc upd upe upo upp upr ups upu ur- ura urb urc urd ure uro urp urr urs uru