c-- ccc cce cco cct ccu ccx ce- cec cee ceo cet ceu cex co- coc coe coo cot cou cox ctc cte cto ctt ctu ctx cuc cue cuo cut cuu cxc cxo cxt cxx ec- ecc ece eco ect ecu ecx eec eee eeo eet eex eo- eoc eoe eoo eot eou etc ete eto ett etu etx eu- euc eue eut eux ex- exc exe exo ext exu exx oc- occ oco oct ocu ocx oec oee oeo oet oex oo- ooc ooo oot oox ot- otc ote oto ott otu ou- ouc oue ouo out ox- oxc oxo oxt oxx t-x tcc tce tco tct tcu tcx te- tec tee teo tet teu tex to- toc toe too tot tou tox ttc tte tto ttt ttu ttx tuc tue tuo tut tuu tux txe txt txu ucc uce uco uct ucu uec uee uet uoc uoe uoo uot uox utc ute uto utt utu utx uuc uue uut uuu uxc uxo uxt uxu xcx xee xet xeu xex xoc xoo xot xox xtc xtx xue xxo xxx