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 male tennis player in a yellow shirt is playing tennis'. How many words end with the letter 's' in the sentence.
Example Output: 3

Example Input: Sentence: 'a cat laying on its back while in a cat bed'. How many words end with the letter 's' in the sentence.
Example Output: 1

Example Input: Sentence: 'a blue heron standing among tree branches in front of a river'. How many words end with the letter 'n' in the sentence.
Example Output:
2