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 group of men and women standing in front of a ribbon'. How many words end with the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'a shirtless skateboarder doing tricks on his board'. How many words end with the letter 's' in the sentence.
Example Output: 3

Example Input: Sentence: 'a clock on the outside of a stone building'. How many words end with the letter 'a' in the sentence.
Example Output:
2