-ic bbb bbc bbd bbe bbi bbk bbn bcb bcc bcd bce bci bck bcn bdb bdc bdd bde bdi bdk be- beb bec bed bee bei bek ben bi- bib bic bid bie bii bik bin bkb bkc bke bkk bkn bnb bnc bnd bne bni bnk bnn c-- cbb cbc cbd cbe cbi cbk cbn ccb ccc ccd cce cci cck ccn cdb cdc cdd cde cdi cdk cdn ce- ceb cec ced cee cei cek cen ci- cib cic cid cie cii cik cin ckb ckc ckd cki cn- cnb cnc cnd cne cni cnn dbb dbc dbd dbe dbi dbk dbn dcb dcc dcd dce dci dck dcn ddb ddc ddd dde ddi ddk ddn de- deb dec ded dee dei dek den di- dib dic did die dii dik din dkb dkc dke dki dkk dnb dnc dnd dne dni dnk dnn ebb ebc ebd ebe ebi ebk ebn ec- ecb ecc ecd ece eci eck ecn ed- edb edc edd ede edi edk edn eeb eec eed eee eek een eib eic eid eie eii eik ein ekb ekc ekd eke eki en- enb enc end ene eni enk enn i-d ibb ibc ibd ibe ibi ibk ibn icb icc icd ice ici ick icn idb idc idd ide idi idk idn ie- iec ied iee iei iek ien iib iic iid iie iii iin ikb ikc ike iki ikk in- inb inc ind ine ini ink inn kbb kbc kbd kbe kbi kbk kbn kcb kcc kcd kce kci kck kcn kdb kdc kde kdk ke- keb kec ked kee kei kek ken kib kic kid kie kii kik kin kkb kkc kke kki kkk kkn kn- knc knd kne kni knk knn n-i nbb nbc nbd nbe nbi nbk nbn ncb ncc ncd nce nci nck ncn ndb ndc ndd nde ndi ndk ndn ne- neb nec ned nee nei nek nen nib nic nid nie nii nik nin nkc nke nki nkk nkn nnb nnc nne nni nnk nnn