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 green fire hydrant is in the middle of an open dirt hole in a construction area'. How many words start with the letter 'a' in the sentence.
answer:
4


question:
Sentence: 'two elephants with people riding on them next to block barriers'. How many words start with the letter 'o' in the sentence.
answer:
1


question:
Sentence: 'a man riding a motorcycle next to a long bearded biker'. How many words start with the letter 'a' in the sentence.
answer:

3