`A-B`

Answer

To solve the problem of finding \( A - B \), where \( A \) is the set of letters in the word "Delhi" and \( B \) is the set of letters in the word "Doll", we will follow these steps:

### Step 1: Identify the sets \( A \) and \( B \)
- The letters in the word "Delhi" are: D, E, L, H, I
- Therefore, set \( A = \{ D, E, L, H, I \} \)

- The letters in the word "Doll" are: D, O, L
- Therefore, set \( B = \{ D, O, L \} \)

### Step 2: Write down the elements of sets \( A \) and \( B \)
- Set \( A = \{ D, E, L, H, I \} \)
- Set \( B = \{ D, O, L \} \)

### Step 3: Find the common elements in sets \( A \) and \( B \)
- The common elements between \( A \) and \( B \) are: D and L

### Step 4: Subtract the common elements from set \( A \)
- We will remove the common elements (D and L) from set \( A \):
- Start with \( A = \{ D, E, L, H, I \} \)
- Remove D: \( A \) becomes \( \{ E, L, H, I \} \)
- Remove L: \( A \) becomes \( \{ E, H, I \} \)

### Step 5: Write the final result
- The result of \( A - B \) is \( \{ E, H, I \} \)

Thus, the final answer is:
\[ A - B = \{ E, H, I \} \]

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