-er c-- ccc ccd cce ccr ccs ccu ccz cdc cdd cde cdr cds cdu cdz ce- cec ced cee cer ces ceu cez crc crd cre crr crs cru crz csc csd cse csr css csu csz cuc cud cue cur cus cuu cuz cz- czc czd cze dcc dcd dce dcr dcs dcu ddc ddd dde ddr dds ddu ddz de- dec ded dee der des deu dez drc drd dre drr drs dru drz dsc dsd dse dsr dss dsu dsz duc dud due dur dus duz dzd dze dzr dzs dzu ec- ecc ecd ece ecr ecs ecu ed- edc edd ede edr eds edu eec eed eee eer ees erc erd ere err ers eru erz es- esc esd ese esr ess esu eu- euc eud eue eur eus eze ezr ezs ezz rcc rcd rce rcr rcs rcu rdc rdd rde rdr rds rdu re- rec red ree rer res reu rez rrc rrd rrr rrs rru rsc rsd rse rsr rss rsu ruc rud rue rur rus ruu ruz rze scc scd sce scr scs scu sdc sdd sde sdr sds sdu sdz se- sec sed see ser ses seu sez sr- src srd sre srr srs ss- ssc ssd sse ssr sss ssu ssz suc sud sue sur sus suu suz szd sze szr szu ucc ucd uce ucr ucs ucu udc udd ude udr uds udu uec ued uee uer ues ur- urc urd ure urr urs uru urz usc usd use usr uss usu usz uuc uue uur uus uuu uzu zce zcs zds zec zed zee zer zes zez zrs zse zsu zsz zuc zud zur zus zuz zzr zzs zzz