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: 'a yellow grey and white bird on a small group of twigs'. How many words start with the letter 'b' in the sentence.
[A]: 1


[Q]: Sentence: 'a boy waves at the camera standing on a tree stump'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'the half eaten meal consists of pizza and pasta'. How many words start with the letter 'p' in the sentence.
[A]:
2