-ic a-a a-b a-c a-i aaa aab aac aad aah aai aao ab- aba abb abc abd abh abi abo ac- aca acb acc acd ach aci aco ad- ada adb adc add adh adi ado aha ahb ahc ahd ahh ahi aho ai- aia aib aic aid aih aii aio aoa aob aoc aod aoh aoi aoo baa bab bac bad bah bai bao bba bbb bbc bbd bbh bbi bbo bca bcb bcc bcd bch bci bco bda bdb bdc bdd bdh bdi bdo bha bhb bhc bhd bhh bhi bho bi- bia bib bic bid bih bii bio boa bob boc bod boh boi boo c-- caa cab cac cad cah cai cao cba cbb cbc cbd cbh cbi cbo cca ccb ccc ccd cch cci cco cda cdb cdc cdd cdh cdi cdo ch- cha chb chc chd chh chi cho ci- cia cib cic cid cih cii cio co- coa cob coc cod coh coi coo daa dab dac dad dah dai dao dba dbb dbc dbd dbh dbi dbo dca dcb dcc dcd dci dco dda ddb ddc ddd ddh ddi ddo dh- dha dhb dhc dhd dhh dhi dho di- dia dib dic did dih dii dio doa dob doc dod doh doi doo h-i haa hab hac had hah hai hao hba hbb hbc hbd hbh hbi hbo hca hcb hcc hcd hch hci hco hda hdb hdc hdd hdh hdi hdo hha hhb hhc hhd hhh hhi hho hia hib hic hid hih hii hio hoa hob hoc hod hoh hoi hoo i-d ia- iaa iab iac iad iah iai iao iba ibb ibc ibd ibh ibi ibo ica icb icc icd ich ici ico ida idb idc idd idh idi ido iha ihb ihc ihd ihh ihi iho iia iib iic iid iih iii iio io- ioa iob ioc iod ioh ioi ioo o-i oaa oab oac oad oah oai oao ob- oba obb obc obd obh obi obo oc- oca ocb occ ocd och oci oco oda odb odc odd odh odi odo oha ohc ohd ohh ohi oho oia oib oic oid oii oio oo- ooa oob ooc ood ooh ooi ooo