In a certain code language, A is coded as Z, B as Y, C as X, and so on. How…

Concept

In reverse-alphabet coding, each letter is replaced by the letter at the same distance from the opposite end of the alphabet. If a letter has position n from A, its code has position 27 − n from A; equivalently, the two positions add to 27.

Application

1. P is the 16th letter, so its opposite letter is K, the 11th letter (16 + 11 = 27).

2. E is the 5th letter, so its opposite letter is V, the 22nd letter (5 + 22 = 27).

3. R is the 18th letter, so its opposite letter is I, the 9th letter (18 + 9 = 27).

4. F is the 6th letter, so its opposite letter is U, the 21st letter (6 + 21 = 27).

5. The second E again becomes V.

6. C is the 3rd letter, so its opposite letter is X, the 24th letter (3 + 24 = 27).

7. T is the 20th letter, so its opposite letter is G, the 7th letter (20 + 7 = 27).

Cross-check

Applying the same rule to the coded letters returns the original word: K→P, V→E, I→R, U→F, V→E, X→C, and G→T. This confirms the letter-by-letter transformation.

Result

Therefore, PERFECT is coded as KVIUVXG.