Suppose that some 64-bit DES master key resulted in the following 56-bit key after being run through the parity bit drop: (Knowing a weak key is one that generates the same round key in more than one round.) 0101 0101 0101 0101 0101 0101 0101 1010 1010 1010 1010 1010 1010 1010 Show that this is a weak key, by showing that it produces the same round key in more than one round.

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