-ic a-a a-b a-c a-i aaa aab aac aad aai aan aao ab- aba abb abc abd abi abn abo ac- aca acb acc acd aci acn aco ad- ada adb adc add adi adn ado ai- aia aib aic aid aii ain aio an- ana anb anc and ani ann ano aoa aob aoc aod aoi aon aoo baa bab bac bad bai ban bao bba bbb bbc bbd bbi bbn bbo bca bcb bcc bcd bci bcn bco bda bdb bdc bdd bdi bdo bi- bia bib bic bid bii bin bio bna bnb bnc bnd bni bnn bno boa bob boc bod boi bon boo c-- caa cab cac cad cai can cao cba cbb cbc cbd cbi cbn cbo cca ccb ccc ccd cci ccn cco cda cdb cdc cdd cdi cdn cdo ci- cia cib cic cid cii cin cio cn- cna cnb cnc cnd cni cnn cno co- coa cob coc cod coi con coo daa dab dac dad dai dan dao dba dbb dbc dbd dbi dbn dbo dca dcb dcc dcd dci dcn dco dda ddb ddc ddd ddi ddn ddo di- dia dib dic did dii din dio dna dnb dnc dnd dni dnn dno doa dob doc dod doi don doo i-d ia- iaa iab iac iad iai ian iao iba ibb ibc ibd ibi ibn ibo ica icb icc icd ici icn ico ida idb idc idd idi idn ido iia iib iic iid iii iin iio in- ina inb inc ind ini inn ino io- ioa iob ioc iod ioi ion ioo n-i naa nab nac nad nai nan nao nba nbb nbc nbd nbi nbn nbo nca ncb ncc ncd nci ncn nco nda ndb ndc ndd ndi ndn ndo nia nib nic nid nii nin nio nna nnb nnc nni nnn nno no- noa nob noc nod noi non noo o-i oaa oab oac oad oai oan oao ob- oba obb obc obd obi obn obo oc- oca ocb occ ocd oci ocn oco oda odb odc odd odi odn odo oia oib oic oid oii oin oio on- ona onb onc ond oni onn ono oo- ooa oob ooc ood ooi oon ooo