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: 'there are three people riding a trolly up a snow mountain'. How many words end with the letter 'e' in the sentence.
Example Output: 4

Example Input: Sentence: 'a tennis player at the us open walking off the court'. How many words end with the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man riding a skateboard while having a mohawk'. How many words end with the letter 'k' in the sentence.
Example Output:
1