-er a-a a-c aaa aac aae aak aar aas aau aav ac- aca acc ace ack acr acs acu acv aea aec aee aek aer aes aeu aev aka akc ake akk akr aks aku akv ar- ara arc are ark arr ars aru arv as- asa asc ase ask asr ass asu asv au- aua auc aue auk aur aus auv av- ava avc ave avk avr avs avu c-- caa cac cae cak car cas cau cav cca ccc cce cck ccr ccs ccu ccv ce- cea cec cee cek cer ces ceu cev cka ckc cks cra crc cre crk crr crs cru crv csa csc cse csk csr css csu csv cua cuc cue cuk cur cus cuu cuv cva cvc cve cvk cvr cvs cvu cvv eaa eac eae eak ear eas eau eav ec- eca ecc ece eck ecr ecs ecu ecv eea eec eee eek eer ees eev eka ekc eke ekr eks eku ekv era erc ere erk err ers eru erv es- esa esc ese esk esr ess esu esv eu- eua euc eue eur eus euv eva evc eve evr evs evv ka- kaa kac kae kak kar kas kau kav kca kcc kce kck kcr kcs kcu ke- kea kec kee kek ker kes kev kkc kke kkk kkr kks kku kkv kra krc krk krr krs kru krv ksa ksc kse ksk ksr kss ksu ksv kuc kue kuk kur kus kuu kva kvk kvr kvs kvv ra- raa rac rae rak rar ras rau rav rca rcc rce rcr rcs rcu rcv re- rea rec ree rek rer res reu rev rkc rke rkk rks rku rkv rra rrc rrk rrr rrs rru rsa rsc rse rsk rsr rss rsu rsv rua ruc rue ruk rur rus ruu ruv rva rvc rve rvr rvs rvu rvv saa sac sae sak sar sas sau sav sca scc sce sck scr scs scu scv se- sea sec see sek ser ses seu sev sk- ska skc ske skk skr sks sku sr- sra src sre srk srr srs srv ss- ssa ssc sse ssk ssr sss ssu ssv sua suc sue suk sur sus suu suv sva svc sve svk svr svs svu svv ua- uaa uac uae uak uar uas uau uav uca ucc uce uck ucr ucs ucu ucv uea uec uee uer ues uka ukc uke ukk ukr uku ur- ura urc ure urk urr urs uru usa usc use usk usr uss usu usv uua uuc uue uur uus uuu uva uvc uve uvs uvu uvv v-a v-e vaa vac vae vak var vas vau vav vca vcc vce vcr vcs vcu vea vec vee vek ver ves veu vka vra vrc vre vrk vrr vrs vru vsa vsc vse vsk vsr vss vsu vsv vue vuk vur vus vuv vva vvc vvr vvs vvv