A xor B#5868

A xor B

1 second
128 megabytes
Very easy

Holy simplicity!Jan Hus

Two positive integers and are given. Apply the bitwise exclusive or operation to them.

Input

Two positive integers and (a, b \le 10^9).

Output

Print the result of applying xor operation over the given numbers.

Examples

Example 1

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Example 2

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