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: 'person in profile and sunlight at a barred window'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'horses are being walked around a race track'. How many words start with the letter 't' in the sentence.
[A]: 1


[Q]: Sentence: 'a crowd of people playing frisbee on a field'. How many words start with the letter 'c' in the sentence.
[A]:
1