Each letter stands for a 
unique number.  All letters should be replaced by 
numbers in such a way that the arithmetic problem shown is correct. Different letters must never have the same number.


  SANTA
+ CLAUS
───────
 ADVENT


~~~~~~~~~~~~~~~~
Found assignment
~~~~~~~~~~~~~~~~

+---+---+---+---+---+---+---+---+---+---+
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
+---+---+---+---+---+---+---+---+---+---+
|   |   |   |   | V |   |   |   |   |   |
+---+---+---+---+---+---+---+---+---+---+

The following solution 
shows the correct assignment of letters 
to numbers that makes the calculation work. Each assignment is unique and fulfills all the conditions of alphametics.


  81591
+ 23168
───────
 104759


~~~~~~~~~~~~~~~~~~
Correct assignment
~~~~~~~~~~~~~~~~~~

+---+---+---+---+---+---+---+---+---+---+
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
+---+---+---+---+---+---+---+---+---+---+
| D | A | C | L | V | N | U | E | S | T |
+---+---+---+---+---+---+---+---+---+---+