-er c-- ccc ccd cce ccn cco ccr ccu cdc cdd cde cdn cdo cdq cdr cdu ce- cec ced cee cen ceo ceq cer ceu cn- cnc cnd cne cnn cno cnr cnu co- coc cod coe con coo coq cor cou cqc cqd cqo crc crd cre crn cro crq crr cru cuc cud cue cun cuo cuq cur cuu dcc dcd dce dcn dco dcr dcu ddc ddd dde ddn ddo ddq ddr ddu de- dec ded dee den deo deq der deu dnc dnd dne dnn dno dnq dnr doc dod doe don doo doq dor dou dqe dqn drc drd dre drn dro drq drr dru duc dud due dun duo dur ec- ecc ecd ece ecn eco ecq 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 eoq eor eou eqe eqn eqq equ erc erd ere ern ero erq 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 nqc nrc nrd nre nrn nro nrr nru nuc nud nue nun nuo nuq 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 oqo or- orc ord ore orn oro orr oru ou- ouc oud oue oun ouo our qcc qcd qco qdr qec qed qee qen qeo qnd qne qoo qor qqq qqu qrc qre qru qu- qud que quo qur rcc rcd rce rcn rco rcr rcu rdc rdd rde rdn rdo rdr rdu re- rec red ree ren reo req rer reu rnc rnd rnn rno rnr rnu roc rod roe ron roo ror rou rqc rqn rrc rrd rrn rrq 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 unq unr unu uoc uod uoe uon uoo uor ur- urc urd ure urn uro urr uru uuc uue uun uur uuu