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: 'young child in grassy field with ball and flying disc'. How many words end with the letter 'g' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man surfing a wave with both hands in the air'. How many words end with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man in a leather outfit and a helmet driving a black motorcycle'. How many words end with the letter 'a' in the sentence.
Example Output:
4