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 man attempting to instruct a small child to use a mechanical toothbrush'. How many words end with the letter 'o' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of people are sitting around a table eating cake'. How many words end with the letter 'a' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a kitchen that has a refrigerator next to a sink'. How many words end with the letter 'r' in the sentence.

Ex Output:

1