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 eating a number of sandwiches next to a bottle of water'. How many words end with the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'a giraffe some dirt some grass and trees'. How many words end with the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'a black and white photo of a train pulling into the station'. How many words end with the letter 'a' in the sentence.
Example Output:
2