-ic bbb bbc bbg bbi bbk bbn bbr bcb bcc bcg bci bck bcn bcr bgb bgc bgg bgi bgk bgn bgr bi- bib bic big bii bik bin bir bkb bkc bkg bkk bkn bkr bnb bnc bng bni bnk bnn bnr brb brg bri brk brn brr c-- cbb cbc cbg cbi cbk cbn cbr ccb ccc ccg cci cck ccn ccr cgb cgc cgg cgi cgn cgr ci- cib cic cig cii cik cin cir ckb ckc cki cn- cnb cnc cng cni cnn cnr crb crc crg cri crk crn crr gbc gbg gbi gbk gbn gbr gcb gcc gcg gci gck gcn gcr ggb ggc ggg ggi ggn ggr gib gic gig gii gik gin gir gkb gkn gnb gnc gni gnn gnr grb grc grg gri grk grn grr ibb ibc ibg ibi ibk ibn ibr icb icc icg ici ick icn icr igb igc igg igi igk ign igr iib iic iii iin iir ikb ikc iki ikk ikr in- inb inc ing ini ink inn inr ir- irb irc irg iri irk irn irr kbb kbc kbi kbk kbn kbr kcb kcc kcg kci kck kcn kcr kgb kgc kgi kib kic kig kii kik kin kir kkb kkc kki kkk kkn kkr kn- knc kng kni knk knn knr krc krg kri krk krn krr n-i nbb nbc nbg nbi nbk nbn nbr ncb ncc ncg nci nck ncn ncr ngb ngc ngg ngi ngk ngn nib nic nig nii nik nin nir nkc nki nkk nkn nkr nnb nnc nng nni nnk nnn nrb nrc nrg nri nrk nrn nrr rbb rbc rbg rbi rbk rbn rbr rcb rcc rcg rci rcn rcr rgb rgc rgg rgi rgk rgn rgr rib ric rig rii rik rin rir rkb rkc rkg rkk rnb rnc rng rni rnn rnr rrb rrc rrg rri rrk rrn rrr