c-- ccc cce ccn cco cct ce- cec cee cen ceo ceq cet cn- cnc cne cnn cno cnt co- coc coe con coo coq cot cqc cqo cqt ctc cte ctn cto ctq ctt ec- ecc ece ecn eco ecq ect eec eee een eeo eet en- enc ene enn eno ent eo- eoc eoe eon eoo eoq eot eqe eqn eqq eqt etc ete etn eto ett ncc nce ncn nco nct ne- nec nee nen neo net nnc nne nnn nno nnt no- noc noe non noo not nqc nqt ntc nte ntn nto ntq ntt oc- occ ocn oco oct oec oee oen oeo oet on- onc one onn ono ont oo- ooc oon ooo oot oqo ot- otc ote otn oto ott qcc qco qct qec qee qen qeo qet qne qoo qqq qtc qto qtq tcc tce tcn tco tct te- tec tee ten teo teq tet tnc tne tnn tno tnq tnt to- toc toe ton too toq tot tqo ttc tte ttn tto ttt