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 Input:
Sentence: 'a view out the window of a passenger jet airplane below are some snow capped mountains'. How many words end with the letter 'w' in the sentence.

Ex Output:
4

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

Ex Output:
2

Ex Input:
Sentence: 'two boats are sitting her in front of a break wall'. How many words end with the letter 'n' in the sentence.

Ex Output:
1