-ic a-a a-c a-i aaa aac aae aag aai aan aao aax ac- aca acc ace acg aci acn aco acx aea aec aee aeg aei aen aeo aex ag- aga agc age agg agi agn ago agx ai- aia aic aie aig aii ain aio aix an- ana anc ane ang ani ann ano anx aoa aoc aoe aog aoi aon aoo aox ax- axa axe axi axn axo axx c-- caa cac cae cag cai can cao cax cca ccc cce ccg cci ccn cco ccx ce- cea cec cee ceg cei cen ceo cex cga cgc cge cgg cgi cgn cgo ci- cia cic cie cig cii cin cio cix cn- cna cnc cne cng cni cnn cno cnx co- coa coc coe cog coi con coo cox cxc cxi cxo cxx eaa eac eae eag eai ean eao eax ec- eca ecc ece ecg eci ecn eco ecx eea eec eee eeg een eeo eex ega egc ege egg egi egn ego egx eia eic eie eig eii ein eio eix en- ena enc ene eng eni enn eno eo- eoa eoc eoe eog eoi eon eoo ex- exa exc exe exi exo exx gaa gac gae gag gai gan gao gca gcc gce gcg gci gcn gco ge- gea gec gee geg gei gen geo gex gga ggc ggg ggi ggn ggo gia gic gie gig gii gin gio gna gnc gne gni gnn gno goa goc goe gog goi gon goo gox gxa ia- iaa iac iae iag iai ian iao ica icc ice icg ici icn ico ie- iea iec iee ieg iei ien iex iga igc ige igg igi ign igo iia iic iie iii iin iio iix in- ina inc ine ing ini inn ino inx io- ioa ioc ioe iog ioi ion ioo ixc ixe ixi ixn n-i naa nac nae nag nai nan nao nax nca ncc nce ncg nci ncn nco ncx ne- nea nec nee neg nei nen neo nex nga ngc nge ngg ngi ngn ngo nia nic nie nig nii nin nio nix nna nnc nne nng nni nnn nno no- noa noc noe nog noi non noo nox nxc o-i oaa oac oae oag oai oan oao oax oc- oca occ ocg oci ocn oco ocx oea oec oee oeg oei oen oeo oex oga ogc oge ogg ogi ogn ogo ogx oia oic oie oii oin oio on- ona onc one ong oni onn ono onx oo- ooa ooc oog ooi oon ooo oox ox- oxa oxc oxi oxn oxo oxx xaa xac xag xan xci xcx xee xeg xen xex xge xgi xia xic xie xii xin xio xix xna xnc xno xoa xoc xog xoi xon xoo xox xxi xxo xxx