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.

Q: Sentence: 'a train moves across a train crossing in a city'. How many words start with the letter 'c' in the sentence.

A: 2
****
Q: Sentence: 'a sandwich vegetables and a beer sitting on a table'. How many words start with the letter 'a' in the sentence.

A: 4
****
Q: Sentence: 'a police car driving by a construction truck'. How many words start with the letter 'b' in the sentence.

A:
1
****