-er c-- ccc ccd cce ccn cco ccr ccu cdc cdd cde cdn cdo cdr cdu ce- cec ced cee cen ceo cer ceu cn- cnc cnd cne cnn cno cnr cnu co- coc cod coe con coo cor cou crc crd cre crn cro crr cru cuc cud cue cun cuo cur cuu dcc dcd dce dcn dco dcr dcu ddc ddd dde ddn ddo ddr ddu de- dec ded dee den deo der deu dnc dnd dne dnn dno dnr doc dod doe don doo dor dou drc drd dre drn dro drr dru duc dud due dun duo dur ec- ecc ecd ece ecn eco ecr ecu ed- edc edd ede edn edo edr edu eec eed eee een eeo eer en- enc end ene enn eno enr enu eo- eoc eod eoe eon eoo eor eou erc erd ere ern ero err eru eu- euc eud eue eun eur ncc ncd nce ncn nco ncr ncu ndc ndd nde ndn ndo ndr ndu ne- nec ned nee nen neo ner neu nnc nne nnn nno nnu no- noc nod noe non noo nor nou nrc nrd nre nrn nro nrr nru nuc nud nue nun nuo nur nuu oc- occ ocd ocn oco ocr ocu odc odd ode odn odo odr odu oec oed oee oen oeo oer on- onc ond one onn ono onr onu oo- ooc ood oon ooo oor or- orc ord ore orn oro orr oru ou- ouc oud oue oun ouo our rcc rcd rce rcn rco rcr rcu rdc rdd rde rdn rdo rdr rdu re- rec red ree ren reo rer reu rnc rnd rnn rno rnr rnu roc rod roe ron roo ror rou rrc rrd rrn rrr rru ruc rud rue run ruo rur ruu ucc ucd uce ucn uco ucr ucu udc udd ude udn udo udr udu uec ued uee uen uer un- unc und une unn uno unr unu uoc uod uoe uon uoo uor ur- urc urd ure urn uro urr uru uuc uue uun uur uuu