-er c-- ccc ccd cce ccr cct ccu ccx cdc cdd cde cdr cdt cdu cdx ce- cec ced cee cer cet ceu cex crc crd cre crr crt cru crx ctc ctd cte ctr ctt ctu ctx cuc cud cue cur cut cuu cxc cxr cxt cxx dcc dcd dce dcr dct dcu dcx ddc ddd dde ddr ddt ddu ddx de- dec ded dee der det deu dex drc drd dre drr drt dru drx dtc dtd dte dtr dtt dtu dtx duc dud due dur dut dux dxc dxd dxr dxt dxx ec- ecc ecd ece ecr ect ecu ecx ed- edc edd ede edr edt edu edx eec eed eee eer eet eex erc erd ere err ert eru etc etd ete etr ett etu etx eu- euc eud eue eur eut eux ex- exc exd exe exr ext exu exx rcc rcd rce rcr rct rcu rcx rdc rdd rde rdr rdt rdu rdx re- rec red ree rer ret reu rex rrc rrd rrr rrt rru rtc rtd rte rtr rtt rtu rtx ruc rud rue rur rut ruu rux rxr t-x tcc tcd tce tcr tct tcu tcx tdc tdd tde tdr tdt tdu tdx te- tec ted tee ter tet teu tex trc trd tre trr trt tru trx ttc ttd tte ttr ttt ttu ttx tuc tud tue tur tut tuu tux txe txt txu ucc ucd uce ucr uct ucu udc udd ude udr udt udu udx uec ued uee uer uet ur- urc urd ure urr urt uru urx utc utd ute utr utt utu utx uuc uue uur uut uuu uxc uxr uxt uxu xcd xcr xcx xdc xde xdr xdt xed xee xer xet xeu xex xrc xrd xrt xrx xtc xtr xtx xue xxx