-ic a-a a-b a-c a-i aaa aab aac aad aae aai aan ab- aba abb abc abd abe abi abn ac- aca acb acc acd ace aci acn ad- ada adb adc add ade adi adn aea aeb aec aed aee aei aen ai- aia aib aic aid aie aii ain an- ana anb anc and ane ani ann baa bab bac bad bae bai ban bba bbb bbc bbd bbe bbi bbn bca bcb bcc bcd bce bci bcn bda bdb bdc bdd bde bdi be- bea beb bec bed bee bei ben bi- bia bib bic bid bie bii bin bna bnb bnc bnd bne bni bnn c-- caa cab cac cad cae cai can cba cbb cbc cbd cbe cbi cbn cca ccb ccc ccd cce cci ccn cda cdb cdc cdd cde cdi cdn ce- cea ceb cec ced cee cei cen ci- cia cib cic cid cie cii cin cn- cna cnb cnc cnd cne cni cnn daa dab dac dad dae dai dan dba dbb dbc dbd dbe dbi dbn dca dcb dcc dcd dce dci dcn dda ddb ddc ddd dde ddi ddn de- dea deb dec ded dee dei den di- dia dib dic did die dii din dna dnb dnc dnd dne dni dnn eaa eab eac ead eae eai ean eba ebb ebc ebd ebe ebi ebn ec- eca ecb ecc ecd ece eci ecn ed- eda edb edc edd ede edi edn eea eeb eec eed eee een eia eib eic eid eie eii ein en- ena enb enc end ene eni enn i-d ia- iaa iab iac iad iae iai ian iba ibb ibc ibd ibe ibi ibn ica icb icc icd ice ici icn ida idb idc idd ide idi idn ie- iea iec ied iee iei ien iia iib iic iid iie iii iin in- ina inb inc ind ine ini inn n-i naa nab nac nad nae nai nan nba nbb nbc nbd nbe nbi nbn nca ncb ncc ncd nce nci ncn nda ndb ndc ndd nde ndi ndn ne- nea neb nec ned nee nei nen nia nib nic nid nie nii nin nna nnb nnc nne nni nnn