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 is eating a number of sandwiches next to a bottle of water'. How many words end with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman in black with her feet in a suitcase'. How many words end with the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a train is sitting on the train tracks'. How many words end with the letter 'n' in the sentence.

Ex Output:

3