-er -up a-a a-c aaa aac aae aan aap aar aau aax ac- aca acc ace acn acp acr acu acx aea aec aee aen aep aer aeu aex an- ana anc ane ann anp anr anu anx ap- apa apc ape apn app apr apu apx ar- ara arc are arn arp arr aru arx au- aua auc aue aun aup aur aux ax- axa axe axn axp axr axx c-- caa cac cae can cap car cau cax cca ccc cce ccn ccp ccr ccu ccx ce- cea cec cee cen cep cer ceu cex cn- cna cnc cne cnn cnp cnr cnu cnx cpa cpc cpe cpn cpp cpr cpu cpx cra crc cre crn crp crr cru crx cua cuc cue cun cup cur cuu cxc cxp cxr cxx eaa eac eae ean eap ear eau eax ec- eca ecc ece ecn ecr ecu ecx eea eec eee een eep eer eex en- ena enc ene enn enp enr enu ep- epa epc epe epn epp epr epu epx era erc ere ern erp err eru eu- eua euc eue eun eup eur eux ex- exa exc exe exp exr exu exx naa nac nae nan nap nar nau nax nca ncc nce ncn ncp ncr ncu ncx ne- nea nec nee nen nep ner neu nex nna nnc nne nnn nnp nnu npa npc npe npn npp npr npu nra nrc nre nrn nrp nrr nru nrx nua nuc nue nun nup nur nuu nux nxc p-p paa pac pae pan pap par pau pax pca pcc pce pcn pcp pcr pcu pcx pea pec pee pen pep per peu pex pn- pna pnc pne pnn pnp pnr pnu pnx ppa ppc ppe ppn ppp ppr ppu ppx pra prc pre prn prp prr pru prx pua puc pue pun pup pur puu pxc pxe pxr ra- raa rac rae ran rap rar rau rax rca rcc rce rcn rcp rcr rcu rcx re- rea rec ree ren rep rer reu rex rna rnc rnn rnp rnr rnu rpa rpc rpe rpn rpp rpr rpu rpx rra rrc rrn rrp rrr rru rua ruc rue run rup rur ruu rux rxp rxr ua- uaa uac uae uan uap uar uau uca ucc uce ucn ucp ucr ucu uea uec uee uen uep uer un- una unc une unn unp unr unu unx up- upa upc upe upn upp upr upu upx ur- ura urc ure urn urp urr uru urx uua uuc uue uun uur uuu uxc uxr uxu xaa xac xan xap xar xau xcp xcr xcx xee xen xep xer xeu xex xna xnc xnu xpa xpc xpe xpn xpp xrc xrx xue xun xup xxp xxx