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 large dog stands on the back of a sofa sniffing at it while another dog rests on the sofa itself'. How many words end with the letter 'e' in the sentence.
Example Output: 4

Example Input: Sentence: 'a burger and some fries on a white plate'. How many words end with the letter 's' in the sentence.
Example Output: 1

Example Input: Sentence: 'a yellow type of train is sitting on train tracks'. How many words end with the letter 's' in the sentence.
Example Output:
2