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.

[Q]: Sentence: 'a group of people are standing outside while one holds an open umbrella'. How many words end with the letter 'n' in the sentence.
[A]: 2


[Q]: Sentence: 'a train traveling down tracks next to trees'. How many words end with the letter 't' in the sentence.
[A]: 1


[Q]: Sentence: 'the batter stands ready at the plate as the umpire crouches down behind the catcher'. How many words end with the letter 's' in the sentence.
[A]:
3