-er c-- ccc cce ccr cct ccu ccz ce- cec cee cer cet ceu cez crc cre crr crt cru crz ctc cte ctr ctt ctu ctz cuc cue cur cut cuu cuz cz- czc cze czt ec- ecc ece ecr ect ecu eec eee eer eet erc ere err ert eru erz etc ete etr ett etu etz eu- euc eue eur eut eze ezr ezz rcc rce rcr rct rcu re- rec ree rer ret reu rez rrc rrr rrt rru rtc rte rtr rtt rtu rtz ruc rue rur rut ruu ruz rze tcc tce tcr tct tcu te- tec tee ter tet teu tez trc tre trr trt tru trz ttc tte ttr ttt ttu tuc tue tur tut tuu tuz tze tzu ucc uce ucr uct ucu uec uee uer uet ur- urc ure urr urt uru urz utc ute utr utt utu utz uuc uue uur uut uuu uzu zce zec zee zer zet zez zte ztr zuc zur zut zuz zzr zzt zzz