-er c-- ccc ccd cce cck ccl ccn ccr ccu cdc cdd cde cdk cdl cdn cdr cdu ce- cec ced cee cek cel cen cer ceu ckc ckd cl- clc cld cle clk cll cln clr clu cn- cnc cnd cne cnl cnn cnr cnu crc crd cre crk crl crn crr cru cuc cud cue cuk cul cun cur cuu dcc dcd dce dck dcl dcn dcr dcu ddc ddd dde ddk ddl ddn ddr ddu de- dec ded dee dek del den der deu dkc dke dkk dkl dkr dku dl- dlc dld dle dlk dll dlr dlu dnc dnd dne dnk dnl dnn dnr drc drd dre drk drl drn drr dru duc dud due duk dul dun dur ec- ecc ecd ece eck ecl ecn ecr ecu ed- edc edd ede edk edl edn edr edu eec eed eee eek eel een eer ekc ekd eke ekl ekr eku elc eld ele elk ell eln elr elu en- enc end ene enk enl enn enr enu erc erd ere erk erl ern err eru eu- euc eud eue eul eun eur kcc kcd kce kck kcl kcn kcr kcu kdc kde kdk kdl kdr kdu ke- kec ked kee kek kel ken ker kkc kke kkk kkl kkn kkr kku kl- klc kld klr klu kn- knc knd kne knk knl knn knr knu krc krd krk krl krn krr kru kuc kud kue kuk kul kun kur kuu lcc lcd lce lck lcl lcn lcr lcu ldc ldd lde ldk ldl ldn ldr ldu lec led lee lek lel len ler leu lkl lkr llc lld lle llk lll lln llr llu lnc lnd lne lnk lnl lnn lnr lnu lrc lrd lrk lrn lrr lru luc lud lue luk lul lun lur luu ncc ncd nce nck ncl ncn ncr ncu ndc ndd nde ndk ndl ndn ndr ndu ne- nec ned nee nek nel nen ner neu nkc nke nkk nkn nkr nku nlc nld nle nlk nll nln nlr nlu nnc nne nnk nnl nnn nnu nrc nrd nre nrk nrl nrn nrr nru nuc nud nue nuk nul nun nur nuu rcc rcd rce rcl rcn rcr rcu rdc rdd rde rdl rdn rdr rdu re- rec red ree rek rel ren rer reu rkc rke rkk rku rlc rld rle rll rln rlr rlu rnc rnd rnn rnr rnu rrc rrd rrk rrl rrn rrr rru ruc rud rue ruk run rur ruu ucc ucd uce uck ucl ucn ucr ucu udc udd ude udk udl udn udr udu uec ued uee uel uen uer ukc uke ukk ukl ukn ukr uku ulc uld ule ulk ull uln ulr ulu un- unc und une unk unl unn unr unu ur- urc urd ure urk url urn urr uru uuc uue uun uur uuu