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 dog running behind three sheep in an open field'. How many words end with the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'a bird hunts for bugs in the tall grass'. How many words end with the letter 's' in the sentence.
Example Output: 3

Example Input: Sentence: 'a child atop a brown horse with adults on both sides'. How many words end with the letter 's' in the sentence.
Example Output:
2