-ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aao aat ab- aba abb abc abd abe abi abo abt ac- aca acb acc acd ace aci aco act ad- ada adb adc add ade adi ado adt aea aeb aec aed aee aei aeo aet ai- aia aib aic aid aie aii aio ait aoa aob aoc aod aoe aoi aoo aot at- ata atb atc atd ate ati ato att baa bab bac bad bae bai bao bat bba bbb bbc bbd bbe bbi bbo bbt bca bcb bcc bcd bce bci bco bct bda bdb bdc bdd bde bdi bdo bdt be- bea beb bec bed bee bei beo bet bi- bia bib bic bid bie bii bio bit boa bob boc bod boe boi boo bot bta btb btc btd bte bti bto btt c-- caa cab cac cad cae cai cao cat cba cbb cbc cbd cbe cbi cbo cbt cca ccb ccc ccd cce cci cco cct cda cdb cdc cdd cde cdi cdo cdt ce- cea ceb cec ced cee cei ceo cet ci- cia cib cic cid cie cii cio cit co- coa cob coc cod coe coi coo cot cta ctb ctc ctd cte cti cto ctt daa dab dac dad dae dai dao dat dba dbb dbc dbd dbe dbi dbo dbt dca dcb dcc dcd dce dci dco dct dda ddb ddc ddd dde ddi ddo ddt de- dea deb dec ded dee dei deo det di- dia dib dic did die dii dio dit doa dob doc dod doe doi doo dot dta dtb dtc dtd dte dti dto dtt eaa eab eac ead eae eai eao eat eba ebb ebc ebd ebe ebi ebo ebt ec- eca ecb ecc ecd ece eci eco ect ed- eda edb edc edd ede edi edo edt eea eeb eec eed eee eeo eet eia eib eic eid eie eii eio eit eo- eoa eob eoc eod eoe eoi eoo eot eta etb etc etd ete eti eto ett i-d ia- iaa iab iac iad iae iai iao iat iba ibb ibc ibd ibe ibi ibo ibt ica icb icc icd ice ici ico ict ida idb idc idd ide idi ido idt ie- iea iec ied iee iei iet iia iib iic iid iie iii iio iit io- ioa iob ioc iod ioe ioi ioo iot ita itb itc itd ite iti ito itt o-i oaa oab oac oad oae oai oao oat ob- oba obb obc obd obe obi obo obt oc- oca ocb occ ocd oci oco oct oda odb odc odd ode odi odo odt oea oeb oec oed oee oei oeo oet oia oib oic oid oie oii oio oit oo- ooa oob ooc ood ooi ooo oot ot- ota otb otc otd ote oti oto ott taa tab tac tad tae tai tao tat tba tbb tbc tbd tbe tbi tbo tbt tca tcb tcc tcd tce tci tco tct tda tdb tdc tdd tde tdi tdo tdt te- tea teb tec ted tee tei teo tet tia tib tic tid tie tii tio tit to- toa tob toc tod toe toi too tot tta ttb ttc ttd tte tti tto ttt