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 grey cat starring at a hand with a donut'. How many words start with the letter 'a' in the sentence.
answer:
4


question:
Sentence: 'a closeup picture of a polar bears head'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'there is a blue bus stopped at the bus stop for passengers'. How many words start with the letter 'b' in the sentence.
answer:

3