cryptarithm

Solve the following cryptarithm:


       O N E
    +  O N E
 -------------
       T W O

Determine the digit represented by each letter to make the addition correct.

E =
O =
N =
T =
W =

Here is the answer:


  2 3 1
+ 2 3 1
-------
  4 6 2

and there are many other solutions.