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 riding a wave on top of  surfboards'. How many words end with the letter 'f' in the sentence.
Example Output: 2

Example Input: Sentence: 'a snowboarder on the ground after a fall'. How many words end with the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'woman signing a ceremonial book while a man looks on'. How many words end with the letter 'l' in the sentence.
Example Output:
1