c-- ccc cce cco ccs cct ccu ccx ce- cec cee ceo ces cet ceu cex co- coc coe coo cos cot cou cox csc cse cso css cst csu csx ctc cte cto cts ctt ctu ctx cuc cue cuo cus cut cuu cxc cxo cxs cxt cxx ec- ecc ece eco ecs ect ecu ecx eec eee eeo ees eet eex eo- eoc eoe eoo eos eot eou es- esc ese eso ess est esu esx etc ete eto ets ett etu etx eu- euc eue eus eut eux ex- exc exe exo exs ext exu exx oc- occ oco ocs oct ocu ocx oec oee oeo oes oet oex oo- ooc ooo oos oot oox os- osc ose oso oss ost osu osx ot- otc ote oto ots ott otu ou- ouc oue ouo ous out ox- oxc oxo oxt oxx scc sce sco scs sct scu scx se- sec see seo ses set seu sex soc soe soo sos sot sou sox ss- ssc sse sso sss sst ssu ssx stc ste sto sts stt stu stx suc sue suo sus sut suu sux sxc sxs sxt sxu t-x tcc tce tco tcs tct tcu tcx te- tec tee teo tes tet teu tex to- toc toe too tos tot tou tox tsc tse tso tss tst tsu tsx ttc tte tto tts ttt ttu ttx tuc tue tuo tus tut tuu tux txe txs txt txu ucc uce uco ucs uct ucu uec uee ues uet uoc uoe uoo uos uot uox usc use uso uss ust usu usx utc ute uto uts utt utu utx uuc uue uus uut uuu uxc uxo uxt uxu xcx xee xes xet xeu xex xoc xoo xos xot xox xsc xss xst xtc xts xtx xue xus xxo xxx