c-- ccc ccd cce cck ccn cco cct cdc cdd cde cdk cdn cdo cdt ce- cec ced cee cek cen ceo cet ckc ckd cko ckt cn- cnc cnd cne cnn cno cnt co- coc cod coe cok con coo cot ctc ctd cte ctk ctn cto ctt dcc dcd dce dck dcn dco dct ddc ddd dde ddk ddn ddo ddt de- dec ded dee dek den deo det dkc dke dkk dko dkt dnc dnd dne dnk dnn dno dnt doc dod doe dok don doo dot dtc dtd dte dtk dtn dto dtt ec- ecc ecd ece eck ecn eco ect ed- edc edd ede edk edn edo edt eec eed eee eek een eeo eet ekc ekd eke eko ekt en- enc end ene enk enn eno ent eo- eoc eod eoe eok eon eoo eot etc etd ete etk etn eto ett k-t kcc kcd kce kck kcn kct kdc kde kdk kdo kdt ke- kec ked kee kek ken keo ket kkc kke kkk kkn kkt kn- knc knd kne knk knn kno knt koc kod koe kok kon koo kot ktc kte ktk ktn kto ktt ncc ncd nce nck ncn nco nct ndc ndd nde ndk ndn ndo ndt ne- nec ned nee nek nen neo net nkc nke nkk nkn nko nkt nnc nne nnk nnn nno nnt no- noc nod noe nok non noo not ntc ntd nte ntk ntn nto ntt oc- occ ocd ock ocn oco oct odc odd ode odn odo odt oec oed oee oen oeo oet okc okd oke okk oko on- onc ond one onk onn ono ont oo- ooc ood ook oon ooo oot ot- otc otd ote otk otn oto ott tcc tcd tce tck tcn tco tct tdc tdd tde tdk tdn tdo tdt te- tec ted tee tek ten teo tet tkc tke tkk tko tkt tnc tnd tne tnk tnn tno tnt to- toc tod toe tok ton too tot ttc ttd tte ttk ttn tto ttt