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: 'a womans face next to an oven cooking food'. How many words start with the letter 'f' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a young man holding a tennis racquet and its case'. How many words start with the letter 'h' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a view of a beach and the ocean with some people walking along the shore'. How many words start with the letter 's' in the sentence.

Ex Output:
2