Question: Letter pairs in a message word are coded as digraphs using the letter coding scheme shown in Table 1 , then encrypted using modular addition

Letter pairs in a message word are coded as digraphs using

Letter pairs in a message word are coded as digraphs using the letter coding scheme shown in Table 1 , then encrypted using modular addition with a modulus equal to the maximum key space possible. Work out the encrypted value for the first pair of letters in the word encryption, when using a key of 598. Table 1

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