Generate an opening line of a story that contains the protagonist, "Alice".
Alice woke up to the sound of a loud knock at her door, which was strange because she wasn't expecting any visitors.
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate an opening line of a story that contains the protagonist, "Alice".

### Output:
Alice woke up to the sound of a loud knock at her door, which was strange because she wasn't expecting any visitors.