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.

Example Input: Sentence: 'a flock of birds some on the ground others are perched on a park bench'. How many words end with the letter 'k' in the sentence.
Example Output: 2

Example Input: Sentence: 'a cat laying on top of a couch on its side'. How many words end with the letter 's' in the sentence.
Example Output: 1

Example Input: Sentence: 'two animals walking through high grass in the woods'. How many words end with the letter 's' in the sentence.
Example Output:
3