In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

Sentence: 'car pass threw a green light in the day light'. How many words start with the letter 'd' in the sentence.
1

Sentence: 'a man wearing glasses collecting samples in a container in a forest'. How many words start with the letter 'g' in the sentence.
1

Sentence: 'a purple and green bus driving down a street'. How many words start with the letter 'a' in the sentence.

3