Given a list of items separated by a comma, construct a sentence using all the items.
book, pen, pencil
I have a book, a pen, and a pencil.
Complete the following task based on the instruction and optional input provided.### Instruction:
Given a list of items separated by a comma, construct a sentence using all the items.

### Input:
book, pen, pencil

### Output:
I have a book, a pen, and a pencil.