XOR 1#5085

XOR 1

1 second
64 megabytes
Very easy

Two binary numbers, each with digits, are provided.

Your task is to compute the XOR of these two numbers.

Input

First, the number is given. Following this, two binary numbers are provided, each on a separate line (1 \leq N \leq 500).

Output

Output a single binary number, which is the result of the XOR operation, having digits.

Examples

Example 1

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