In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

Ex Input:
Sentence: 'the large horse is getting his hooves shaped'. How many words start with the letter 'h' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man riding on top of a wave on a surfboard'. How many words start with the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman that is holding up a banana'. How many words start with the letter 'w' in the sentence.

Ex Output:

1