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Learning Opportunities

This puzzle can be solved using the following concepts. Practice using these concepts and improve your skills.

Statement

 Goal

Your task is to identify minimal possible numeral system of the simple equality X+Y=Z.
Input
Line 1: A string S representing the equality X+Y=Z.
Output
Line 1 : Sought numeral system N.
Constraints
2 ≤ N ≤ 36
1 ≤ Length(X) ≤ 10
1 ≤ Length(Y) ≤ 10
1 ≤ Length(Z) ≤ 10
Example
Input
52+38=101
Output
9

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