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.

Sentence: 'a person on a boat with trays of seafood while he sits under a umbrella'. How many words end with the letter 'a' in the sentence.
4

Sentence: 'a man sitting in front of a fish as he guts it'. How many words end with the letter 'g' in the sentence.
1

Sentence: 'a dog running behind three sheep in an open field'. How many words end with the letter 'n' in the sentence.

3