Decode the uppercase string using a Caesar shift of −6; output in lowercase. Given: QNUBDI

Introduction / Context:
Same Caesar −6 decoding applies here.

Given Data / Assumptions:

• Cipher: Caesar −6.
• Input: QNUBDI.

Concept / Approach:
Shift each letter 6 places backward modulo 26, then lowercase.

Step-by-Step Solution:

Verification / Alternative check:
Applying +6 to “hxzosd” recovers “qnubdi”.

Why Other Options Are Wrong:

• vbfnic, algpkj, ymswtx: These represent different transforms and fail the +6 recheck.

Common Pitfalls:
Using +6 instead of −6 or forgetting to wrap A..Z.

Final Answer:
hxzosd