-ic a-a a-b a-c a-i aaa aab aac aad aai ab- aba abb abc abd abi ac- aca acb acc acd aci ad- ada adb adc add adi ai- aia aib aic aid aii baa bab bac bad bai bba bbb bbc bbd bbi bca bcb bcc bcd bci bda bdb bdc bdd bdi bi- bia bib bic bid bii c-- caa cab cac cad cai cba cbb cbc cbd cbi cca ccb ccc ccd cci cda cdb cdc cdd cdi ci- cia cib cic cid cii daa dab dac dad dai dba dbb dbc dbd dbi dca dcb dcc dcd dci dda ddb ddc ddd ddi di- dia dib dic did dii i-d ia- iaa iab iac iad iai iba ibb ibc ibd ibi ica icb icc icd ici ida idb idc idd idi iia iib iic iid iii