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 people in a grassy field with kites in the sky'. How many words end with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'a person playing soccer on a field with a ball'. How many words end with the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man standing on netting at the bow of a boat working on it'. How many words end with the letter 'n' in the sentence.
Example Output:
3