-er c-- ccc ccd cce cck ccr ccs ccu ccz cdc cdd cde cdk cdr cds cdu cdz ce- cec ced cee cek cer ces ceu cez ckc ckd cks crc crd cre crk crr crs cru crz csc csd cse csk csr css csu csz cuc cud cue cuk cur cus cuu cuz cz- czc czd cze czk dcc dcd dce dck dcr dcs dcu ddc ddd dde ddk ddr dds ddu ddz de- dec ded dee dek der des deu dez dkc dke dkk dkr dks dku drc drd dre drk drr drs dru drz dsc dsd dse dsk dsr dss dsu dsz duc dud due duk dur dus duz dzd dze dzr dzs dzu ec- ecc ecd ece eck ecr ecs ecu ed- edc edd ede edk edr eds edu eec eed eee eek eer ees ekc ekd eke ekr eks eku erc erd ere erk err ers eru erz es- esc esd ese esk esr ess esu eu- euc eud eue eur eus eze ezr ezs ezz k-z kcc kcd kce kck kcr kcs kcu kdc kde kdk kdr kds kdu ke- kec ked kee kek ker kes kez kkc kke kkk kkr kks kku krc krd krk krr krs kru ksc ksd kse ksk ksr kss ksu kuc kud kue kuk kur kus kuu rcc rcd rce rcr rcs rcu rdc rdd rde rdr rds rdu re- rec red ree rek rer res reu rez rkc rke rkk rks rku rkz rrc rrd rrk rrr rrs rru rsc rsd rse rsk rsr rss rsu ruc rud rue ruk rur rus ruu ruz rze scc scd sce sck scr scs scu sdc sdd sde sdk sdr sds sdu sdz se- sec sed see sek ser ses seu sez sk- skc skd ske skk skr sks sku sr- src srd sre srk srr srs ss- ssc ssd sse ssk ssr sss ssu ssz suc sud sue suk sur sus suu suz szd sze szr szu ucc ucd uce uck ucr ucs ucu udc udd ude udk udr uds udu uec ued uee uer ues ukc uke ukk ukr uku ukz ur- urc urd ure urk urr urs uru urz usc usd use usk usr uss usu usz uuc uue uur uus uuu uzu zce zcs zds zec zed zee zek zer zes zez zks zrs zse zsu zsz zuc zud zuk zur zus zuz zzr zzs zzz