Question: Peppa and George communicate using the PairTrio cipher with a different key than in the example. Lucina intercepts a ciphertext and determines the plaintext, as

Peppa and George communicate using the PairTrio cipher with a different key
than in the example. Lucina intercepts a ciphertext and determines the plaintext, as
shown.
Plaintext TEN LORDS A-LEAPING, NINE LADIES DANCING GAILY
Ciphertext XNE YZJUH M-YNMAWEV, EWEN YMUWNH UMETWEV VMWYF Determine with justification the number of possibilities for the full key, listing them.

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