-er -up a-a a-b a-c aaa aab aac aad aae aak aao aap aar aau ab- aba abb abc abd abe abk abo abp abr abu ac- aca acb acc acd ace ack aco acp acr acu ad- ada adb adc add ade adk ado adp adr adu aea aeb aec aed aee aek aeo aep aer aeu aka akb akc akd ake akk ako akp akr aku aoa aob aoc aod aoe aok aoo aop aor aou ap- apa apb apc apd ape apk apo app apr apu ar- ara arb arc ard are ark aro arp arr aru au- aua aub auc aud aue auk auo aup aur b-p b-u baa bab bac bad bae bak bao bap bar bau bba bbb bbc bbd bbe bbk bbo bbp bbr bbu bca bcb bcc bcd bce bck bco bcp bcr bcu bda bdb bdc bdd bde bdk bdo bdp bdr bdu be- bea beb bec bed bee bek beo bep ber beu bka bkb bkc bke bkk bko bkp bkr boa bob boc bod boe bok boo bop bor bou bpa bpb bpc bpd bpe bpo bpp bpr bpu bra brb brd bre brk bro brp brr bru bua bub buc bud bue buk buo bup bur buu c-- caa cab cac cad cae cak cao cap car cau cba cbb cbc cbd cbe cbk cbo cbp cbr cbu cca ccb ccc ccd cce cck cco ccp ccr ccu cda cdb cdc cdd cde cdk cdo cdp cdr cdu ce- cea ceb cec ced cee cek ceo cep cer ceu cka ckb ckc ckd cko co- coa cob coc cod coe cok coo cop cor cou cpa cpb cpc cpd cpe cpk cpo cpp cpr cpu cra crb crc crd cre crk cro crp crr cru cua cub cuc cud cue cuk cuo cup cur cuu daa dab dac dad dae dak dao dap dar dau dba dbb dbc dbd dbe dbk dbo dbp dbr dbu dca dcb dcc dcd dce dck dco dcp dcr dcu dda ddb ddc ddd dde ddk ddo ddp ddr ddu de- dea deb dec ded dee dek deo dep der deu dka dkb dkc dke dkk dko dkp dkr dku doa dob doc dod doe dok doo dop dor dou dpa dpb dpc dpd dpe dpk dpo dpp dpr dpu dra drb drc drd dre drk dro drp drr dru dua dub duc dud due duk duo dup dur eaa eab eac ead eae eak eao eap ear eau eba ebb ebc ebd ebe ebk ebo ebp ebr ebu ec- eca ecb ecc ecd ece eck eco ecr ecu ed- eda edb edc edd ede edk edo edp edr edu eea eeb eec eed eee eek eeo eep eer eka ekb ekc ekd eke eko ekp ekr eku eo- eoa eob eoc eod eoe eok eoo eop eor eou ep- epa epb epc epd epe epo epp epr epu era erb erc erd ere erk ero erp err eru eu- eua eub euc eud eue eup eur ka- kaa kab kac kad kae kak kao kap kar kau kba kbb kbc kbd kbe kbk kbo kbp kbr kbu kca kcb kcc kcd kce kck kcp kcr kcu kda kdb kdc kde kdk kdo kdp kdr kdu ke- kea keb kec ked kee kek keo kep ker kkb kkc kke kkk kkp kkr kku koa kob koc kod koe kok koo kop kor kou kpa kpc kpd kpe kpk kpo kpp kpr kpu kra krc krd krk kro krp krr kru kub kuc kud kue kuk kup kur kuu oaa oab oac oad oae oak oao oap oar oau ob- oba obb obc obd obe obk obo obp obr obu oc- oca ocb occ ocd ock oco ocp ocr ocu oda odb odc odd ode odo odp odr odu oea oeb oec oed oee oeo oep oer oka okb okc okd oke okk oko okp okr oku oo- ooa oob ooc ood ook ooo oop oor op- opa opb opc opd ope opk opo opp opr or- ora orb orc ord ore ork oro orp orr oru ou- oua ouc oud oue ouk ouo oup our p-p paa pab pac pad pae pak pao pap par pau pba pbb pbc pbd pbe pbk pbo pbp pbr pbu pca pcb pcc pcd pce pck pco pcp pcr pcu pda pdb pdc pdd pde pdk pdo pdp pdr pdu pea peb pec ped pee pek peo pep per peu pka pkb pkc pkd pke pko pkp pkr pku poa pob poc pod poe pok poo pop por pou ppa ppb ppc ppd ppe ppk ppo ppp ppr ppu pra prb prc prd pre prk pro prp prr pru pua pub puc pud pue puk pup pur puu ra- raa rab rac rad rae rak rao rap rar rau rba rbb rbc rbd rbe rbk rbo rbp rbr rbu rca rcb rcc rcd rce rco rcp rcr rcu rda rdb rdc rdd rde rdo rdp rdr rdu re- rea reb rec red ree rek reo rep rer reu rkb rkc rke rkk rko rkp rku roa rob roc rod roe rok roo rop ror rou rpa rpb rpc rpd rpe rpk rpo rpp rpr rpu rra rrb rrc rrd rrk rrp rrr rru rua rub ruc rud rue ruk ruo rup rur ruu ua- uaa uab uac uad uae uak uao uap uar uau uba ubb ubc ube ubk ubo ubp ubr ubu uca ucb ucc ucd uce uck uco ucp ucr ucu uda udb udc udd ude udk udo udp udr udu uea ueb uec ued uee uep uer uka ukb ukc uke ukk ukp ukr uku uoa uob uoc uod uoe uok uoo uop uor up- upa upb upc upd upe upk upo upp upr upu ur- ura urb urc urd ure urk uro urp urr uru uua uuc uue uur uuu

a-ak a-be a-do a-ok aaaa aaab aaac aaad aaae aaap aaar aaba aabb aabc aabd aabp aaca aacb aacc aacd aace aack aaco