c-- ccc ccd cce cco cct ccu cdc cdd cde cdo cdt cdu ce- cec ced cee ceo cet ceu co- coc cod coe coo cot cou ctc ctd cte cto ctt ctu cuc cud cue cuo cut cuu dcc dcd dce dco dct dcu ddc ddd dde ddo ddt ddu de- dec ded dee deo det deu doc dod doe doo dot dou dtc dtd dte dto dtt dtu duc dud due duo dut ec- ecc ecd ece eco ect ecu ed- edc edd ede edo edt edu eec eed eee eeo eet eo- eoc eod eoe eoo eot eou etc etd ete eto ett etu eu- euc eud eue eut oc- occ ocd oco oct ocu odc odd ode odo odt odu oec oed oee oeo oet oo- ooc ood ooo oot ot- otc otd ote oto ott otu ou- ouc oud oue ouo out tcc tcd tce tco tct tcu tdc tdd tde tdo tdt tdu te- tec ted tee teo tet teu to- toc tod toe too tot tou ttc ttd tte tto ttt ttu tuc tud tue tuo tut tuu ucc ucd uce uco uct ucu udc udd ude udo udt udu uec ued uee uet uoc uod uoe uoo uot utc utd ute uto utt utu uuc uue uut uuu