c-- ccc cce ccf ccn cco cct ce- cec cee cef cen ceo cet cfc cfe cff cfn cfo cft cn- cnc cne cnf cnn cno cnt co- coc coe cof con coo cot ctc cte ctf ctn cto ctt ec- ecc ece ecf ecn eco ect eec eee eef een eeo eet ef- efc efe eff efo eft en- enc ene enf enn eno ent eo- eoc eoe eof eon eoo eot etc ete etf etn eto ett fcc fce fcf fcn fco fct fec fee fef fen feo fet ffc ffe fff ffn ffo fft fnc fne fnf fnn fnt foc foe fof fon foo fot ftc fte ftf ftn fto ftt ncc nce ncf ncn nco nct ne- nec nee nef nen neo net nfc nfe nff nfn nfo nft nnc nne nnf nnn nno nnt no- noc noe nof non noo not ntc nte ntf ntn nto ntt oc- occ ocf ocn oco oct oec oee oef oen oeo oet of- ofc ofe off ofn ofo oft on- onc one onf onn ono ont oo- ooc oof oon ooo oot ot- otc ote otf otn oto ott tcc tce tcf tcn tco tct te- tec tee tef ten teo tet tfc tfe tff tfn tfo tft tnc tne tnf tnn tno tnt to- toc toe tof ton too tot ttc tte ttf ttn tto ttt