-ic a-a a-c a-i a-t aaa aac aae aai aao aat aax ac- aca acc ace aci aco act acx aea aec aee aei aeo aet aex ai- aia aic aie aii aio ait aix aoa aoc aoe aoi aoo aot aox at- ata atc ate ati ato att atx ax- axa axe axi axo axt axx c-- caa cac cae cai cao cat cax cca ccc cce cci cco cct ccx ce- cea cec cee cei ceo cet cex ci- cia cic cie cii cio cit cix co- coa coc coe coi coo cot cox cta ctc cte cti cto ctt ctx cxc cxi cxo cxt cxx eaa eac eae eai eao eat eax ec- eca ecc ece eci eco ect ecx eea eec eee eeo eet eex eia eic eie eii eio eit eix eo- eoa eoc eoe eoi eoo eot eta etc ete eti eto ett etx ex- exa exc exe exi exo ext exx ia- iaa iac iae iai iao iat ica icc ice ici ico ict ie- iea iec iee iei iet iex iia iic iie iii iio iit iix io- ioa ioc ioe ioi ioo iot ita itc ite iti ito itt itx ixc ixe ixi o-i oaa oac oae oai oao oat oax oc- oca occ oci oco oct ocx oea oec oee oei oeo oet oex oia oic oie oii oio oit oo- ooa ooc ooi ooo oot oox ot- ota otc ote oti oto ott ox- oxa oxc oxi oxo oxt oxx t-x taa tac tae tai tao tat tax tca tcc tce tci tco tct tcx te- tea tec tee tei teo tet tex tia tic tie tii tio tit tix to- toa toc toe toi too tot tox tta ttc tte tti tto ttt ttx txe txi txt xaa xac xat xci xcx xee xet xex xia xic xie xii xio xit xix xoa xoc xoi xoo xot xox xtc xti xtx xxi xxo xxx