-er -up a-a a-c aaa aac aae aak aap aar aau ac- aca acc ace ack acp acr acu aea aec aee aek aep aer aeu aka akc ake akk akp akr aku ap- apa apc ape apk app apr apu ar- ara arc are ark arp arr aru au- aua auc aue auk aup aur c-- caa cac cae cak cap car cau cca ccc cce cck ccp ccr ccu ce- cea cec cee cek cep cer ceu cka ckc cpa cpc cpe cpk cpp cpr cpu cra crc cre crk crp crr cru cua cuc cue cuk cup cur cuu eaa eac eae eak eap ear eau ec- eca ecc ece eck ecr ecu eea eec eee eek eep eer eka ekc eke ekp ekr eku ep- epa epc epe epp epr epu era erc ere erk erp err eru eu- eua euc eue eup eur ka- kaa kac kae kak kap kar kau kca kcc kce kck kcp kcr kcu ke- kea kec kee kek kep ker kkc kke kkk kkp kkr kku kpa kpc kpe kpk kpp kpr kpu kra krc krk krp krr kru kuc kue kuk kup kur kuu p-p paa pac pae pak pap par pau pca pcc pce pck pcp pcr pcu pea pec pee pek pep per peu pka pkc pke pkp pkr pku ppa ppc ppe ppk ppp ppr ppu pra prc pre prk prp prr pru pua puc pue puk pup pur puu ra- raa rac rae rak rap rar rau rca rcc rce rcp rcr rcu re- rea rec ree rek rep rer reu rkc rke rkk rkp rku rpa rpc rpe rpk rpp rpr rpu rra rrc rrk rrp rrr rru rua ruc rue ruk rup rur ruu ua- uaa uac uae uak uap uar uau uca ucc uce uck ucp ucr ucu uea uec uee uep uer uka ukc uke ukk ukp ukr uku up- upa upc upe upk upp upr upu ur- ura urc ure urk urp urr uru uua uuc uue uur uuu