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.

[EX Q]: Sentence: 'a group of horses standing and laying in a grassy field'. How many words end with the letter 'f' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a train rides across a bridge over water'. How many words end with the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a close up of a person holding an open umbrella'. How many words end with the letter 'n' in the sentence.
[EX A]:
3