-ic a-a a-b a-c a-i aaa aab aac aad aae aah aai aao ab- aba abb abc abd abe abh abi abo ac- aca acb acc acd ace ach aci aco ad- ada adb adc add ade adh adi ado aea aeb aec aed aee aeh aei aeo aha ahb ahc ahd ahe ahh ahi aho ai- aia aib aic aid aie aih aii aio aoa aob aoc aod aoe aoh aoi aoo baa bab bac bad bae bah bai bao bba bbb bbc bbd bbe bbh bbi bbo bca bcb bcc bcd bce bch bci bco bda bdb bdc bdd bde bdh bdi bdo be- bea beb bec bed bee beh bei beo bha bhb bhc bhd bhe bhh bhi bho bi- bia bib bic bid bie bih bii bio boa bob boc bod boe boh boi boo c-- caa cab cac cad cae cah cai cao cba cbb cbc cbd cbe cbh cbi cbo cca ccb ccc ccd cce cch cci cco cda cdb cdc cdd cde cdh cdi cdo ce- cea ceb cec ced cee ceh cei ceo ch- cha chb chc chd che chh chi cho ci- cia cib cic cid cie cih cii cio co- coa cob coc cod coe coh coi coo daa dab dac dad dae dah dai dao dba dbb dbc dbd dbe dbh dbi dbo dca dcb dcc dcd dce dci dco dda ddb ddc ddd dde ddh ddi ddo de- dea deb dec ded dee deh dei deo dh- dha dhb dhc dhd dhe dhh dhi dho di- dia dib dic did die dih dii dio doa dob doc dod doe doh doi doo eaa eab eac ead eae eah eai eao eba ebb ebc ebd ebe ebh ebi ebo ec- eca ecb ecc ecd ece ech eci eco ed- eda edb edc edd ede edh edi edo eea eeb eec eed eee eeo eha ehb ehc ehd ehe ehh ehi eho eia eib eic eid eie eii eio eo- eoa eob eoc eod eoe eoh eoi eoo h-i haa hab hac had hae hah hai hao hba hbb hbc hbd hbe hbh hbi hbo hca hcb hcc hcd hce hch hci hco hda hdb hdc hdd hde hdh hdi hdo he- hea heb hec hed hee heh hei heo hha hhb hhc hhd hhe hhh hhi hho hia hib hic hid hie hih hii hio hoa hob hoc hod hoe hoh hoi hoo i-d ia- iaa iab iac iad iae iah iai iao iba ibb ibc ibd ibe ibh ibi ibo ica icb icc icd ice ich ici ico ida idb idc idd ide idh idi ido ie- iea iec ied iee iei iha ihb ihc ihd ihe ihh ihi iho iia iib iic iid iie iih iii iio io- ioa iob ioc iod ioe ioh ioi ioo o-i oaa oab oac oad oae oah oai oao ob- oba obb obc obd obe obh obi obo oc- oca ocb occ ocd och oci oco oda odb odc odd ode odh odi odo oea oeb oec oed oee oeh oei oeo oha ohc ohd ohe ohh ohi oho oia oib oic oid oie oii oio oo- ooa oob ooc ood ooh ooi ooo