-er -up a-a a-b a-c a-t aaa aab aac aae aan aao aap aar aas aat aau ab- aba abb abc abe abn abo abp abr abs abt abu ac- aca acb acc ace acn aco acp acr acs act acu aea aeb aec aee aen aeo aep aer aes aet aeu an- ana anb anc ane ann ano anp anr ans ant anu aoa aob aoc aoe aon aoo aop aor aos aot aou ap- apa apb apc ape apn apo app apr aps apt apu ar- ara arb arc are arn aro arp arr ars art aru as- asa asb asc ase asn aso asp asr ass ast asu at- ata atb atc ate atn ato atp atr ats att atu au- aua aub auc aue aun auo aup aur aus aut b-p b-u baa bab bac bae ban bao bap bar bas bat bau bba bbb bbc bbe bbn bbo bbp bbr bbs bbt bbu bca bcb bcc bce bcn bco bcp bcr bcs bct bcu be- bea beb bec bee ben beo bep ber bes bet beu bna bnb bnc bne bnn bno bnp bnr bns bnt bnu boa bob boc boe bon boo bop bor bos bot bou bpa bpb bpc bpe bpn bpo bpp bpr bps bpt bpu bra brb bre brn bro brp brr brs brt bru bsa bsb bsc bse bsn bso bsp bsr bss bst bsu bta btb btc bte btn bto btp btr bts btt btu bua bub buc bue bun buo bup bur bus but buu c-- caa cab cac cae can cao cap car cas cat cau cba cbb cbc cbe cbn cbo cbp cbr cbs cbt cbu cca ccb ccc cce ccn cco ccp ccr ccs cct ccu ce- cea ceb cec cee cen ceo cep cer ces cet ceu cn- cna cnb cnc cne cnn cno cnp cnr cns cnt cnu co- coa cob coc coe con coo cop cor cos cot cou cpa cpb cpc cpe cpn cpo cpp cpr cps cpt cpu cra crb crc cre crn cro crp crr crs crt cru csa csb csc cse csn cso csp csr css cst csu cta ctb ctc cte ctn cto ctp ctr cts ctt ctu cua cub cuc cue cun cuo cup cur cus cut cuu eaa eab eac eae ean eao eap ear eas eat eau eba ebb ebc ebe ebn ebo ebp ebr ebs ebt ebu ec- eca ecb ecc ece ecn eco ecr ecs ect ecu eea eeb eec eee een eeo eep eer ees eet en- ena enb enc ene enn eno enp enr ens ent enu eo- eoa eob eoc eoe eon eoo eop eor eos eot eou ep- epa epb epc epe epn epo epp epr eps ept epu era erb erc ere ern ero erp err ers ert eru es- esa esb esc ese esn eso esp esr ess est esu eta etb etc ete etn eto etp etr ets ett etu eu- eua eub euc eue eun eup eur eus eut naa nab nac nae nan nao nap nar nas nat nau nba nbb nbc nbe nbn nbo nbp nbr nbs nbt nbu nca ncb ncc nce ncn nco ncp ncr ncs nct ncu ne- nea neb nec nee nen neo nep ner nes net neu nna nnb nnc nne nnn nno nnp nns nnt nnu no- noa nob noc noe non noo nop nor nos not nou npa npb npc npe npn npo npp npr nps npt npu nra nrb nrc nre nrn nro nrp nrr nrs nrt nru nsa nsb nsc nse nsn nso nsp nsr nss nst nsu nta ntb ntc nte ntn nto ntp ntr nts ntt ntu nua nub nuc nue nun nuo nup nur nus nut nuu oaa oab oac oae oan oao oap oar oas oat oau ob- oba obb obc obe obn obo obp obr obs obt obu oc- oca ocb occ ocn oco ocp ocr ocs oct ocu oea oeb oec oee oen oeo oep oer oes oet on- ona onb onc one onn ono onp onr ons ont onu oo- ooa oob ooc oon ooo oop oor oos oot op- opa opb opc ope opn opo opp opr ops opt or- ora orb orc ore orn oro orp orr ors ort oru os- osa osb osc ose osn oso osp osr oss ost osu ot- ota otb otc ote otn oto otp otr ots ott otu ou- oua ouc oue oun ouo oup our ous out p-p paa pab pac pae pan pao pap par pas pat pau pba pbb pbc pbe pbn pbo pbp pbr pbs pbt pbu pca pcb pcc pce pcn pco pcp pcr pcs pct pcu pea peb pec pee pen peo pep per pes pet peu pn- pna pnb pnc pne pnn pno pnp pnr pns pnt pnu poa pob poc poe pon poo pop por pos pot pou ppa ppb ppc ppe ppn ppo ppp ppr pps ppt ppu pra prb prc pre prn pro prp prr prs prt pru ps- psa psb psc pse psn pso psp psr pss pst psu pt- pta ptb ptc pte ptn pto ptp ptr pts ptt ptu pua pub puc pue pun pup pur pus put puu ra- raa rab rac rae ran rao rap rar ras rat rau rba rbb rbc rbe rbn rbo rbp rbr rbs rbt rbu rca rcb rcc rce rcn rco rcp rcr rcs rct rcu re- rea reb rec ree ren reo rep rer res ret reu rna rnb rnc rnn rno rnp rnr rns rnt rnu roa rob roc roe ron roo rop ror ros rot rou rpa rpb rpc rpe rpn rpo rpp rpr rps rpt rpu rra rrb rrc rrn rrp rrr rrs rrt rru rsa rsb rsc rse rsn rso rsp rsr rss rst rsu rta rtb rtc rte rtn rto rtp rtr rts rtt rtu rua rub ruc rue run ruo rup rur rus rut ruu saa sab sac sae san sao