In this task, you need to count the number of words in a sentence that end with the given letter. Answer with numbers and not words.

[Q]: Sentence: 'a group of people riding a wave on top of surfboards'. How many words end with the letter 'f' in the sentence.
[A]: 2

[Q]: Sentence: 'cat standing on top of a toilet looking out the window'. How many words end with the letter 'e' in the sentence.
[A]: 1

[Q]: Sentence: 'big red truck with lots of yellow stickers on it'. How many words end with the letter 'k' in the sentence.
[A]:
1