The below five plaintext/ciphertext pairs are generated by Playfair with the same (unknown) Playfair key. Can you find the Playfair key from these plaintext/ciphertext pairs? In the answer, you should give sufficient details on how you get this key.

Plaintext 0: We are that far from a turnkey totalitarian state

Ciphertext 0: XDBIFSIUMLBIGLTAMOBHEXFXQSOMRKOMHKNMTQMOGX

Plaintext 1: Never underestimate the time and expense your opponent will take to break your code

Ciphertext 1: EKXCHBAEGKKNOLBNSFPLFSLADNAEKSSCENFXPAIQSVOSEKMSOWKYYMNIFSQAKGNIWTBHDPEF

Plaintext 2: Cryptography is best left to those of a paranoid mindset

Ciphertext 2: GHVTQSRZUOLVKONGTQKFLMQSPLSTDSDMOUIBASWIALAENKQY

Plaintext 3: Cypherpunks write code Cypherpunks publish their code

Ciphertext 3: FVUVGKUCEXOXHKSFDPEFFVUVGKUCEXTOAURKPKPLDKHGAIGX

Plaintext 4: We are legion We do not forgive We do not forget Expect us

Ciphertext 4: XDBIFKFCWAAXFESASQDTZRHWDXFESASQDTZRFSKSSCFPNP