c-- ccc ccf ccn ccr cfc cff cfn cfr cn- cnc cnf cnn cnr cny crc crf crn crr cry cyc cyf cyn cyr fcc fcf fcn fcr fcy ffc fff ffn ffr ffy fnc fnf fnn fnr frc frf frn frr fry fy- fyc fyn ncc ncf ncn ncr nfc nff nfn nfr nnc nnf nnn nrc nrf nrn nrr nry nyc nyf nyn nyy rcc rcf rcn rcr rfc rff rfn rfr rnc rnn rnr rny rrc rrf rrn rrr ry- ryc ryf ryn ryr ryy ycc ycf ycy yfc yff yfr ynn yny yrc yrf yrn yyc yyf yyy