-er -up a-a a-c aaa aac aae aag aap aar aau ac- aca acc ace acg acp acr acu aea aec aee aeg aep aer aeu ag- aga agc age agg agp agr agu ap- apa apc ape apg app apr apu ar- ara arc are arg arp arr aru au- aua auc aue aug aup aur c-- caa cac cae cag cap car cau cca ccc cce ccg ccp ccr ccu ce- cea cec cee ceg cep cer ceu cga cgc cge cgg cgp cgr cgu cpa cpc cpe cpg cpp cpr cpu cra crc cre crg crp crr cru cua cuc cue cug cup cur cuu eaa eac eae eag eap ear eau ec- eca ecc ece ecg ecr ecu eea eec eee eeg eep eer ega egc ege egg egp egr egu ep- epa epc epe epg epp epr epu era erc ere erg erp err eru eu- eua euc eue eug eup eur g-p gaa gac gae gag gap gar gau gca gcc gce gcg gcp gcr gcu ge- gea gec gee geg gep ger geu gga ggc ggg ggp ggr ggu gpa gpc gpe gpg gpp gpr gpu gra grc gre grg grp grr gru gu- gua guc gue gug gup gur guu p-p paa pac pae pag pap par pau pca pcc pce pcg pcp pcr pcu pea pec pee peg pep per peu pga pgc pge pgg pgp pgr ppa ppc ppe ppg ppp ppr ppu pra prc pre prg prp prr pru pua puc pue pug pup pur puu ra- raa rac rae rag rap rar rau rca rcc rce rcg rcp rcr rcu re- rea rec ree reg rep rer reu rga rgc rge rgg rgp rgr rpa rpc rpe rpg rpp rpr rpu rra rrc rrg rrp rrr rru rua ruc rue rug rup rur ruu ua- uaa uac uae uag uap uar uau uca ucc uce ucg ucp ucr ucu uea uec uee ueg uep uer uga ugc uge ugg ugp ugr ugu up- upa upc upe upg upp upr upu ur- ura urc ure urg urp urr uru uua uuc uue uug uur uuu