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 travel bus on a street in a tropical town'. How many words end with the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man in an arena rides a bucking horse'. How many words end with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a little boy sitting next to an elephant with a long trunk'. How many words end with the letter 'o' in the sentence.

Ex Output:

1