-er c-- ccc cce ccl ccr ccs ccu ccv ce- cec cee cel cer ces ceu cev cl- clc cle cll clr cls clu clv crc cre crl crr crs cru crv csc cse csl csr css csu csv cuc cue cul cur cus cuu cuv cvc cve cvl cvr cvs cvu cvv ec- ecc ece ecl ecr ecs ecu ecv eec eee eel eer ees eev elc ele ell elr els elu elv erc ere erl err ers eru erv es- esc ese esl esr ess esu esv eu- euc eue eul eur eus euv evc eve evl evr evs evv lcc lce lcl lcr lcs lcu lcv lec lee lel ler les leu lev llc lle lll llr lls llu llv lrc lrr lrs lru lrv lsc lse lsl lsr lss lsu lsv luc lue lul lur lus luu luv lvc lve lvl lvr lvs lvv rcc rce rcl rcr rcs rcu rcv re- rec ree rel rer res reu rev rlc rle rll rlr rls rlu rrc rrl rrr rrs rru rsc rse rsl rsr rss rsu rsv ruc rue rur rus ruu ruv rvc rve rvl rvr rvs rvu rvv scc sce scl scr scs scu scv se- sec see sel ser ses seu sev slc sle sll slr sls slu slv sr- src sre srl srr srs srv ss- ssc sse ssl ssr sss ssu ssv suc sue sul sur sus suu suv svc sve svl svr svs svu svv ucc uce ucl ucr ucs ucu ucv uec uee uel uer ues ulc ule ull ulr uls ulu ulv ur- urc ure url urr urs uru usc use usl usr uss usu usv uuc uue uur uus uuu uvc uve uvl uvs uvu uvv v-e vcc vce vcl vcr vcs vcu vec vee vel ver ves veu vl- vlc vle vll vls vlv vrc vre vrr vrs vru vsc vse vsl vsr vss vsu vsv vue vul vur vus vuv vvc vvr vvs vvv