Question: The message -7, 16, -8, 21 was encoded with the matrix: A: 1 -4| -2 9 Decode the message by filling in the blanks

The message -7, 16, -8, 21 was encoded with the matrix: A: 1 -4| -2 9 Decode the message by filling in the blanks below (should be a four letter word). 1st letter = 2nd letter = 3rd letter= ,4th letter=
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