-er c-- ccc cce cck ccl ccr ccs cct ccu ce- cec cee cek cel cer ces cet ceu ckc cks ckt cl- clc cle clk cll clr cls clt clu crc cre crk crl crr crs crt cru csc cse csk csl csr css cst csu ctc cte ctk ctl ctr cts ctt ctu cuc cue cuk cul cur cus cut cuu ec- ecc ece eck ecl ecr ecs ect ecu eec eee eek eel eer ees eet ekc eke ekl ekr eks ekt eku elc ele elk ell elr els elt elu erc ere erk erl err ers ert eru es- esc ese esk esl esr ess est esu etc ete etk etl etr ets ett etu eu- euc eue eul eur eus eut k-t kcc kce kck kcl kcr kcs kct kcu ke- kec kee kek kel ker kes ket kkc kke kkk kkl kkr kks kkt kku kl- klc klr kls klt klu krc krk krl krr krs krt kru ksc kse ksk ksl ksr kss kst ksu ktc kte ktk ktl ktr kts ktt ktu kuc kue kuk kul kur kus kut kuu lcc lce lck lcl lcr lcs lct lcu lec lee lek lel ler les let leu lkl lkr lks lkt llc lle llk lll llr lls llt llu lrc lrk lrr lrs lrt lru lsc lse lsk lsl lsr lss lst lsu ltc lte ltk ltl ltr lts ltt ltu luc lue luk lul lur lus lut luu rcc rce rcl rcr rcs rct rcu re- rec ree rek rel rer res ret reu rkc rke rkk rks rkt rku rlc rle rll rlr rls rlt rlu rrc rrk rrl rrr rrs rrt rru rsc rse rsk rsl rsr rss rst rsu rtc rte rtk rtl rtr rts rtt rtu ruc rue ruk rur rus rut ruu scc sce sck scl scr scs sct scu se- sec see sek sel ser ses set seu sk- skc ske skk skl skr sks skt sku slc sle slk sll slr sls slt slu sr- src sre srk srl srr srs srt ss- ssc sse ssk ssl ssr sss sst ssu stc ste stk stl str sts stt stu suc sue suk sul sur sus sut suu tcc tce tck tcl tcr tcs tct tcu te- tec tee tek tel ter tes tet teu tkc tke tkk tkl tkr tks tkt tlc tle tlk tll tlr tls tlt tlu trc tre trk trl trr trs trt tru tsc tse tsk tsl tsr tss tst tsu ttc tte ttk ttl ttr tts ttt ttu tuc tue tuk tul tur tus tut tuu ucc uce uck ucl ucr ucs uct ucu uec uee uel uer ues uet ukc uke ukk ukl ukr uku ulc ule ulk ull ulr uls ult ulu ur- urc ure urk url urr urs urt uru usc use usk usl usr uss ust usu utc ute utk utl utr uts utt utu uuc uue uur uus uut uuu