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 herd of zebra standing in a dirt field'. How many words end with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a boy is riding a skateboard off of a ramp'. How many words end with the letter 's' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a person in a life jacket on a small boat'. How many words end with the letter 'n' in the sentence.

Ex Output:

3