-ic bbb bbc bbi bbn bbr bby bcb bcc bci bcn bcr bcy bi- bib bic bii bin bir biy bnb bnc bni bnn bnr brb bri brn brr bry by- byc byi byn byr c-- cbb cbc cbi cbn cbr cby ccb ccc cci ccn ccr ci- cib cic cii cin cir cn- cnb cnc cni cnn cnr cny crb crc cri crn crr cry cyb cyc cyn cyr ibb ibc ibi ibn ibr iby icb icc ici icn icr icy iib iic iii iin iir in- inb inc ini inn inr iny ir- irb irc iri irn irr iry iyc iyr iyy n-i nbb nbc nbi nbn nbr ncb ncc nci ncn ncr nib nic nii nin nir nnb nnc nni nnn nrb nrc nri nrn nrr nry nyc nyn nyy rbb rbc rbi rbn rbr rcb rcc rci rcn rcr rib ric rii rin rir riy rnb rnc rni rnn rnr rny rrb rrc rri rrn rrr ry- ryc ryn ryr ryy ybc ybi ybr yby ycc yci ycy yii yin yir ynn yny yrc yrn yyb yyc yyy