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: 'zebras and antelopes in a field of dried grass'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'the man is wearing a suit and tie'. How many words start with the letter 't' in the sentence.
[A]: 2


[Q]: Sentence: 'a red and white cellphone sits on a white computer keyboard'. How many words start with the letter 'a' in the sentence.
[A]:
3