Write a function to decrypt a message

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Reference no: EM132199050

Write a function to decrypt a message that was encrypted using the Affine cipher

The input parameters to the function will be the ciphertext, the keys a and b that were used to encode the message and the modulus m.

This function should get the modular inverse of a by calling the function above and then compute the plaintext message.

Reference no: EM132199050

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