Select the equivalent capital letters for the given lowercase string by applying the ATBASH cipher (a↔z, b↔y, …, m↔n) and converting the result to uppercase. Given: hjwlcm Task: Compute Atbash(hjwlcm) and write it in capitals.

Introduction / Context:
This coding–decoding question uses the classic Atbash cipher, where each letter is replaced by its mirror across the alphabet (a↔z, b↔y, c↔x, …, m↔n). After substitution, the result must be written in uppercase.

Given Data / Assumptions:

• Cipher: Atbash on the English alphabet.
• Input: hjwlcm (lowercase).
• Output must be uppercase.

Concept / Approach:
For each letter x, compute its mirror y such that position(x) + position(y) = 27 (using a=1..z=26). Then convert the mapped string to uppercase.

Step-by-Step Solution:

Verification / Alternative check:
Double-apply Atbash to SQDOXN; it returns to HJWLCM, confirming correctness.

Why Other Options Are Wrong:

• HJWTMN, TRCPXO, SQEOWN: Each contains at least one position that is not the Atbash mirror (e.g., w must map to d, not t or e).

Common Pitfalls:
Mistaking m→n (the middle pair) and swapping the letters order. Work left-to-right applying the mirror rule precisely.

Final Answer:
SQDOXN