-ic a-a a-c a-i a-t aaa aac aai aat aax ac- aca acc aci act acx ai- aia aic aii ait aix at- ata atc ati att atx ax- axa axi axt axx c-- caa cac cai cat cax cca ccc cci cct ccx ci- cia cic cii cit cix cta ctc cti ctt ctx cxc cxi cxt cxx ia- iaa iac iai iat ica icc ici ict iia iic iii iit iix ita itc iti itt itx ixc ixi t-x taa tac tai tat tax tca tcc tci tct tcx tia tic tii tit tix tta ttc tti ttt ttx txi txt xaa xac xat xci xcx xia xic xii xit xix xtc xti xtx xxi xxx