-er c-- ccc ccd cce ccr cct ccu ccz cdc cdd cde cdr cdt cdu cdz ce- cec ced cee cer cet ceu cez crc crd cre crr crt cru crz ctc ctd cte ctr ctt ctu ctz cuc cud cue cur cut cuu cuz cz- czc czd cze czt dcc dcd dce dcr dct dcu ddc ddd dde ddr ddt ddu ddz de- dec ded dee der det deu dez drc drd dre drr drt dru drz dtc dtd dte dtr dtt dtu dtz duc dud due dur dut duz dzd dze dzr dzu ec- ecc ecd ece ecr ect ecu ed- edc edd ede edr edt edu eec eed eee eer eet erc erd ere err ert eru erz etc etd ete etr ett etu etz eu- euc eud eue eur eut eze ezr ezz rcc rcd rce rcr rct rcu rdc rdd rde rdr rdt rdu re- rec red ree rer ret reu rez rrc rrd rrr rrt rru rtc rtd rte rtr rtt rtu rtz ruc rud rue rur rut ruu ruz rze tcc tcd tce tcr tct tcu tdc tdd tde tdr tdt tdu te- tec ted tee ter tet teu tez trc trd tre trr trt tru trz ttc ttd tte ttr ttt ttu tuc tud tue tur tut tuu tuz tzd tze tzu ucc ucd uce ucr uct ucu udc udd ude udr udt udu uec ued uee uer uet ur- urc urd ure urr urt uru urz utc utd ute utr utt utu utz uuc uue uur uut uuu uzu zce zdt zec zed zee zer zet zez zte ztr zuc zud zur zut zuz zzr zzt zzz