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 woman playing with an interactive gaming unit'. How many words end with the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a bathroom with a mirror sink towel and shower curtain'. How many words end with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'a group of three birds standing on top of a pile of rocks'. How many words end with the letter 'p' in the sentence.
Example Output:
2