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 man is in a group of people on a skateboard'. How many words end with the letter 'f' in the sentence.
Example Output: 1

Example Input: Sentence: 'many sheep are out in the green grass'. How many words end with the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a dozen glazed doughnuts with different patterns in a box'. How many words end with the letter 'n' in the sentence.
Example Output:
2