Step 1: Analyze the coding pattern.
The logic for this code is complex. Let's try to decipher a consistent rule.
A possible, though non-obvious, rule could be:
The Letter: The letter corresponding to the number of letters in the word (e.g., 4 letters \textrightarrow D).
The Number: A value derived from the letter positions.
Let's test this:
- Work: 4 letters, so the code starts with D. The position of the last letter 'K' is 11. This gives D11.
- Hard: 4 letters, so the code starts with D. For the number '9', a possible logic is the sum of the positions of the first two letters (H=8, A=1, so 8+1=9). This gives D9.
Step 2: Apply the derived logic.
Based on this inconsistent but plausible logic that matches the answer:
- Code for 'Work' is D11.
- Code for 'Hard' is D9.
So, 'Work Hard' is written as 'D11 D9'.
Note: This question is ambiguous as the rule is not consistently applied. The solution is reverse-engineered from the given answer.