-er c-- ccc cce cck ccr cct ccu ccz ce- cec cee cek cer cet ceu cez ckc ckt crc cre crk crr crt cru crz ctc cte ctk ctr ctt ctu ctz cuc cue cuk cur cut cuu cuz cz- czc cze czk czt ec- ecc ece eck ecr ect ecu eec eee eek eer eet ekc eke ekr ekt eku erc ere erk err ert eru erz etc ete etk etr ett etu etz eu- euc eue eur eut eze ezr ezz k-t k-z kcc kce kck kcr kct kcu ke- kec kee kek ker ket kez kkc kke kkk kkr kkt kku krc krk krr krt kru ktc kte ktk ktr ktt ktu kuc kue kuk kur kut kuu rcc rce rcr rct rcu re- rec ree rek rer ret reu rez rkc rke rkk rkt rku rkz rrc rrk rrr rrt rru rtc rte rtk rtr rtt rtu rtz ruc rue ruk rur rut ruu ruz rze tcc tce tck tcr tct tcu te- tec tee tek ter tet teu tez tkc tke tkk tkr tkt tkz trc tre trk trr trt tru trz ttc tte ttk ttr ttt ttu tuc tue tuk tur tut tuu tuz tze tzu ucc uce uck ucr uct ucu uec uee uer uet ukc uke ukk ukr uku ukz ur- urc ure urk urr urt uru urz utc ute utk utr utt utu utz uuc uue uur uut uuu uzu zce zec zee zek zer zet zez zte ztr zuc zuk zur zut zuz zzr zzt zzz