instruction:
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.
question:
Sentence: 'a man using a laptop computer on a table'. How many words start with the letter 'a' in the sentence.
answer:
3


question:
Sentence: 'a young man holding a tennis racquet and its case'. How many words start with the letter 'h' in the sentence.
answer:
1


question:
Sentence: 'a red and white bus driving down a street next to a building'. How many words start with the letter 'n' in the sentence.
answer:

1