In the following passage, identify the alliteration used.
A daring deer dashed down the dirt driveway.
The alliteration used in the sentence "A daring deer dashed down the dirt driveway" is the repetition of the sound of the letter 'd' at the beginning of several words: daring, deer, dashed, down, dirt and driveway.
Complete the following task based on the instruction and optional input provided.### Instruction:
In the following passage, identify the alliteration used.

### Input:
A daring deer dashed down the dirt driveway.

### Output:
The alliteration used in the sentence "A daring deer dashed down the dirt driveway" is the repetition of the sound of the letter 'd' at the beginning of several words: daring, deer, dashed, down, dirt and driveway.