To decipher the code, we can see that each letter in the word "MICROWAVE" is shifted by a specific number of positions in the alphabet to obtain the corresponding letter in the code. Let's determine the shift pattern:
M -> L (shifted back by 1) I -> J (shifted forward by 1) C -> B (shifted back by 1) R -> S (shifted forward by 1) O -> N (shifted back by 1) W -> X (shifted forward by 1) A -> Z (shifted back by 1) V -> W (shifted forward by 1) E -> D (shifted back by 1)
Based on this pattern, we can apply the same shifting to the word "POPULAR":
P -> O (shifted back by 1) O -> N (shifted back by 1) P -> O (shifted back by 1) U -> T (shifted back by 1) L -> K (shifted back by 1) A -> Z (shifted back by 1) R -> Q (shifted back by 1)
Therefore, in the given code, "POPULAR" would be written as "ONONTSQ".