-ic bbb bbc bbe bbf bbi bbn bbo bcb bcc bce bcf bci bcn bco be- beb bec bee bef bei ben beo bfb bfc bfe bff bfi bfn bfo bi- bib bic bie bif bii bin bio bnb bnc bne bnf bni bnn bno bob boc boe bof boi bon boo c-- cbb cbc cbe cbf cbi cbn cbo ccb ccc cce ccf cci ccn cco ce- ceb cec cee cef cei cen ceo cfb cfc cfe cff cfi cfn cfo ci- cib cic cie cif cii cin cio cn- cnb cnc cne cnf cni cnn cno co- cob coc coe cof coi con coo ebb ebc ebe ebf ebi ebn ebo ec- ecb ecc ece ecf eci ecn eco eeb eec eee eef een eeo ef- efb efc efe eff efi efo eib eic eie eif eii ein eio en- enb enc ene enf eni enn eno eo- eob eoc eoe eof eoi eon eoo fbb fbc fbe fbf fbi fbn fbo fcb fcc fce fcf fci fcn fco feb fec fee fef fei fen feo ffc ffe fff ffi ffn ffo fib fic fie fif fii fin fnb fnc fne fnf fni fnn fob foc foe fof foi fon foo i-f ibb ibc ibe ibf ibi ibn ibo icb icc ice icf ici icn ico ie- iec iee ief iei ien ifb ifc ife iff ifi ifn ifo iib iic iie iif iii iin iio in- inb inc ine inf ini inn ino io- iob ioc ioe iof ioi ion ioo n-i nbb nbc nbe nbf nbi nbn nbo ncb ncc nce ncf nci ncn nco ne- neb nec nee nef nei nen neo nfb nfc nfe nff nfi nfn nfo nib nic nie nif nii nin nio nnb nnc nne nnf nni nnn nno no- nob noc noe nof noi non noo o-i ob- obb obc obe obf obi obn obo oc- ocb occ ocf oci ocn oco oeb oec oee oef oei oen oeo of- ofb ofc ofe off ofi ofn ofo oib oic oie oif oii oin oio on- onb onc one onf oni onn ono oo- oob ooc oof ooi oon ooo