# Verbal arithmetic¶

A verbal arithmetic is a mathematical equation among unknown numbers, whose digits are represented by letters (see wikipedia for more details).

## Input data¶

The equation we consider here is:

    S E N D
+   M O R E
-----------
= M O N E Y


A value has to be assigned to each letter in such a way that the equation is satisfied. Note that:

• each letter corresponds to a digit,