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 hand is holding a pack of japanese donuts'. How many words end with the letter 's' in the sentence.
2

Sentence: 'a man standing on the side of water with rough waves'. How many words end with the letter 'r' in the sentence.
1

Sentence: 'there is a living room with chairs a sofa and stairs'. How many words end with the letter 'a' in the sentence.

3