Welcome 2016! Part 33

Logic Level 1

742586+8294301212016 \large{\begin{array}{ccccccc} && 7& 4& 2& 5 & 8&6\\ +&&8 & 2 & 9& 4 & 3&0\\ \hline & 1& 2& 1 & 2& 0 & 1&6\\ \hline \end{array}}

Obviously, the above addition is incorrect.

However, the display can be corrected simply by changing one digit dd, wherever it occurs, to another digit ee. Find the value of d+ed+e.

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