Step 1: Concept
Identify the pattern.
Step 2: Analysis of GREEN $\rightarrow$ IUGGP
- G + 2 = I
- R + 3 = U
- E + 2 = G
- E + 2 = G
- N + 2 = P
Shift: +2, +3, +2, +2, +2. (Possible special case for 2nd letter).
Step 3: Apply to BLACK
- B + 2 = D
- L + 2 = N (Checking if it's constant +2)
- A + 2 = C
- C + 2 = E
- K + 2 = M
Result: DNCEM.
Step 4: Conclusion
Consistent +2 shift for BLACK results in DNCEM.
Final Answer: (1)