-er c-- ccc ccd cce cco ccr cct ccu ccx cdc cdd cde cdo cdr cdt cdu cdx ce- cec ced cee ceo cer cet ceu cex co- coc cod coe coo cor cot cou cox crc crd cre cro crr crt cru crx ctc ctd cte cto ctr ctt ctu ctx cuc cud cue cuo cur cut cuu cxc cxo cxr cxt cxx dcc dcd dce dco dcr dct dcu dcx ddc ddd dde ddo ddr ddt ddu ddx de- dec ded dee deo der det deu dex doc dod doe doo dor dot dou dox drc drd dre dro drr drt dru drx dtc dtd dte dto dtr dtt dtu dtx duc dud due duo dur dut dux dxc dxd dxo dxr dxt dxx ec- ecc ecd ece eco ecr ect ecu ecx ed- edc edd ede edo edr edt edu edx eec eed eee eeo eer eet eex eo- eoc eod eoe eoo eor eot eou erc erd ere ero err ert eru etc etd ete eto etr ett etu etx eu- euc eud eue eur eut eux ex- exc exd exe exo exr ext exu exx oc- occ ocd oco ocr oct ocu ocx odc odd ode odo odr odt odu oec oed oee oeo oer oet oex oo- ooc ood ooo oor oot oox or- orc ord ore oro orr ort oru orx ot- otc otd ote oto otr ott otu ou- ouc oud oue ouo our out ox- oxc oxo oxt oxx rcc rcd rce rco rcr rct rcu rcx rdc rdd rde rdo rdr rdt rdu rdx re- rec red ree reo rer ret reu rex roc rod roe roo ror rot rou rox rrc rrd rrr rrt rru rtc rtd rte rto rtr rtt rtu rtx ruc rud rue ruo rur rut ruu rux rxr t-x tcc tcd tce tco tcr tct tcu tcx tdc tdd tde tdo tdr tdt tdu tdx te- tec ted tee teo ter tet teu tex to- toc tod toe too tor tot tou tox trc trd tre tro trr trt tru trx ttc ttd tte tto ttr ttt ttu ttx tuc tud tue tuo tur tut tuu tux txe txt txu ucc ucd uce uco ucr uct ucu udc udd ude udo udr udt udu udx uec ued uee uer uet uoc uod uoe uoo uor uot uox ur- urc urd ure uro urr urt uru urx utc utd ute uto utr utt utu utx uuc uue uur uut uuu uxc uxo uxr uxt uxu xcd xcr xcx xdc xde xdr xdt xed xee xer xet xeu xex xoc xod xoo xor xot xox xrc xrd xrt xrx xtc xtr xtx xue xxo xxx