Alphabet cipher – apply a Caesar +1 shift to decode the target REASON : SFBTPO :: THINK : ?

Introduction / Context:
This analogy uses a simple Caesar shift (each letter moved by the same number of positions). We identify the shift from the first pair and then apply it to the second source word.

Given Data / Assumptions:

• REASON → SFBTPO is provided.
• We assume A=1 … Z=26 and wrap-around after Z.
• We must transform THINK using the same shift.

Concept / Approach:
Find the displacement letter-by-letter in the known pair. If each letter increases by 1 (a Caesar +1), use that on the second word.

Step-by-Step Solution:

Verification / Alternative check:
Reversing the operation (−1) on UIJOL retrieves THINK, confirming correctness.

Why Other Options Are Wrong:

• SGHMJ/UHNKI/UJKPM: These strings introduce non-uniform shifts or move letters in the wrong direction.

Common Pitfalls:
Using a varying shift across letters or forgetting alphabet wrap-around; overthinking when a simple Caesar shift solves it.

Final Answer:
UIJOL