-ic bbb bbc bbe bbf bbg bbi bbn bcb bcc bce bcf bcg bci bcn be- beb bec bee bef beg bei ben bfb bfc bfe bff bfg bfi bfn bgb bgc bge bgf bgg bgi bgn bi- bib bic bie bif big bii bin bnb bnc bne bnf bng bni bnn c-- cbb cbc cbe cbf cbg cbi cbn ccb ccc cce ccf ccg cci ccn ce- ceb cec cee cef ceg cei cen cfb cfc cfe cff cfg cfi cfn cgb cgc cge cgg cgi cgn ci- cib cic cie cif cig cii cin cn- cnb cnc cne cnf cng cni cnn ebb ebc ebe ebf ebg ebi ebn ec- ecb ecc ece ecf ecg eci ecn eeb eec eee eef eeg een ef- efb efc efe eff efg efi egb egc ege egf egg egi egn eib eic eie eif eig eii ein en- enb enc ene enf eng eni enn fbb fbc fbe fbf fbg fbi fbn fcb fcc fce fcf fcg fci fcn feb fec fee fef feg fei fen ffc ffe fff ffg ffi ffn fgb fgc fge fgf fgg fgi fgn fib fic fie fif fig fii fin fnb fnc fne fnf fng fni fnn gbc gbe gbf gbg gbi gbn gcb gcc gce gcf gcg gci gcn ge- geb gec gee gef geg gei gen gfb gfc gfe gff gfi ggb ggc ggg ggi ggn gib gic gie gif gig gii gin gnb gnc gne gnf gni gnn i-f ibb ibc ibe ibf ibg ibi ibn icb icc ice icf icg ici icn ie- iec iee ief ieg iei ien ifb ifc ife iff ifg ifi ifn igb igc ige igf igg igi ign iib iic iie iif iii iin in- inb inc ine inf ing ini inn n-i nbb nbc nbe nbf nbg nbi nbn ncb ncc nce ncf ncg nci ncn ne- neb nec nee nef neg nei nen nfb nfc nfe nff nfi nfn ngb ngc nge ngf ngg ngi ngn nib nic nie nif nig nii nin nnb nnc nne nnf nng nni nnn