-er -ic c-- ccc ccd cce cci ccr ccu cdc cdd cde cdi cdr cdu ce- cec ced cee cei cer ceu ci- cic cid cie cii cir ciu crc crd cre cri crr cru cuc cud cue cui cur cuu dcc dcd dce dci dcr dcu ddc ddd dde ddi ddr ddu de- dec ded dee dei der deu di- dic did die dii dir diu drc drd dre dri drr dru duc dud due dui dur ec- ecc ecd ece eci ecr ecu ed- edc edd ede edi edr edu eec eed eee eer eic eid eie eii eir eiu erc erd ere eri err eru eu- euc eud eue eui eur i-d icc icd ice ici icr icu idc idd ide idi idr idu ie- iec ied iee iei ier iic iid iie iii iir iiu ir- irc ird ire iri irr iru iu- iuc iud iue iui iur rcc rcd rce rci rcr rcu rdc rdd rde rdi rdr rdu re- rec red ree rei rer reu ric rid rie rii rir rrc rrd rri rrr rru ruc rud rue rui rur ruu ucc ucd uce uci ucr ucu udc udd ude udi udr udu uec ued uee uei uer uic uid uie uii uir uiu ur- urc urd ure uri urr uru uuc uue uur uuu