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 boy is riding a skateboard off of a ramp'. How many words end with the letter 's' in the sentence.
Example Output: 1

Example Input: Sentence: 'this bathroom has a washing machine in it'. How many words end with the letter 'a' in the sentence.
Example Output: 1

Example Input: Sentence: 'a hotdog in white paper slathered in mustard'. How many words end with the letter 'n' in the sentence.
Example Output:
2