E E O 
+ E O O 
---------
O E O E

1. The above alphanumeric equation uses each of the digits from 0 to 9 exactly once.
2. O denotes an odd digit and E denotes an even digit. Zero is considered as an even digit.
3. Each digit in the top row is greater than the digit immediately below it.

..E E O 
+ E O O 
---------  should be
O E O E

..E O O 
+ E E O 
---------   to rend a single solution
O E O E

.....................675+423=1098