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 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 portion of carrot cake is sitting on a plate'. How many words end with the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'a boat with lots of people riding on it down a river'. How many words end with the letter 't' in the sentence.
Example Output:
2