c-- ccc cce ccl ccs cct ccu ccx ce- cec cee cel ces cet ceu cex cl- clc cle cll cls clt clu clx csc cse csl css cst csu csx ctc cte ctl cts ctt ctu ctx cuc cue cul cus cut cuu cxc cxl cxs cxt cxx ec- ecc ece ecl ecs ect ecu ecx eec eee eel ees eet eex elc ele ell els elt elu elx es- esc ese esl ess est esu esx etc ete etl ets ett etu etx eu- euc eue eul eus eut eux ex- exc exe exl exs ext exu exx lcc lce lcl lcs lct lcu lcx lec lee lel les let leu lex llc lle lll lls llt llu lsc lse lsl lss lst lsu ltc lte ltl lts ltt ltu ltx luc lue lul lus lut luu lux lxc lxx scc sce scl scs sct scu scx se- sec see sel ses set seu sex slc sle sll sls slt slu slx ss- ssc sse ssl sss sst ssu ssx stc ste stl sts stt stu stx suc sue sul sus sut suu sux sxc sxl sxs sxt sxu t-x tcc tce tcl tcs tct tcu tcx te- tec tee tel tes tet teu tex tlc tle tll tls tlt tlu tlx tsc tse tsl tss tst tsu tsx ttc tte ttl tts ttt ttu ttx tuc tue tul tus tut tuu tux txe txl txs txt txu ucc uce ucl ucs uct ucu uec uee uel ues uet ulc ule ull uls ult ulu usc use usl uss ust usu usx utc ute utl uts utt utu utx uuc uue uus uut uuu uxc uxt uxu xcl xcx xee xel xes xet xeu xex xls xlt xsc xsl xss xst xtc xts xtx xue xul xus xxl xxx