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 herd of zebra standing in a dirt field'. How many words end with the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'a group of boats docked in front of a warehouse'. How many words end with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man looking at a cow eating grass near the beach'. How many words end with the letter 'a' in the sentence.
Example Output:
2