Categorize the given items and classify them accordingly.
Items: Pen, Pencil, Paper, Keyboard
Category: Stationery and Office Supplies
- Pen: Writing Instrument
- Pencil: Writing Instrument
- Paper: Writing Material
- Keyboard: Computer Accessory
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the given items and classify them accordingly.

### Input:
Items: Pen, Pencil, Paper, Keyboard

### Output:
Category: Stationery and Office Supplies
- Pen: Writing Instrument
- Pencil: Writing Instrument
- Paper: Writing Material
- Keyboard: Computer Accessory