Alphabet Analogy — Alternating Bidirectional Shifts AZBY : CXDW :: EVFU : ?

Introduction / Context:
This alphabet analogy uses alternating shifts: forward then backward repeatedly. Detecting the alternation in the first pair allows us to apply it to the second string precisely.

Given Data / Assumptions:

• First mapping: AZBY → CXDW.
• Second mapping target: EVFU → ?
• Alphabet indexing: A=1 … Z=26.

Concept / Approach:
Compare each position in the first pair to see if the direction and magnitude of shifts alternate. Apply the same +/− pattern consistently to the second sequence.

Step-by-Step Solution:

Verification / Alternative check:
Check reverse: subtracting and adding back restores EVFU, confirming the pattern’s correctness.

Why Other Options Are Wrong:

• GHTS / GSTH / TGSH scramble the order or use incorrect intermediate letters, breaking the strict +2/−2 alternation.
• None of the above: Not applicable because GTHS fits perfectly.

Common Pitfalls:
Forgetting to alternate directions or miscounting positions when wrapping near Z. Here, no wrap-around occurs, simplifying the calculation.

Final Answer:
GTHS