-ic a-a a-b a-c a-i aaa aab aac aad aae aai ab- aba abb abc abd abe abi ac- aca acb acc acd ace aci ad- ada adb adc add ade adi aea aeb aec aed aee aei ai- aia aib aic aid aie aii baa bab bac bad bae bai bba bbb bbc bbd bbe bbi bca bcb bcc bcd bce bci bda bdb bdc bdd bde bdi be- bea beb bec bed bee bei bi- bia bib bic bid bie bii c-- caa cab cac cad cae cai cba cbb cbc cbd cbe cbi cca ccb ccc ccd cce cci cda cdb cdc cdd cde cdi ce- cea ceb cec ced cee cei ci- cia cib cic cid cie cii daa dab dac dad dae dai dba dbb dbc dbd dbe dbi dca dcb dcc dcd dce dci dda ddb ddc ddd dde ddi de- dea deb dec ded dee dei di- dia dib dic did die dii eaa eab eac ead eae eai eba ebb ebc ebd ebe ebi ec- eca ecb ecc ecd ece eci ed- eda edb edc edd ede edi eea eeb eec eed eee eia eib eic eid eie eii i-d ia- iaa iab iac iad iae iai iba ibb ibc ibd ibe ibi ica icb icc icd ice ici ida idb idc idd ide idi ie- iea iec ied iee iei iia iib iic iid iie iii