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 bedroom area with bed two dressers and a window'. How many words start with the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a colorful kite flies over top a house'. How many words start with the letter 'f' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'the cat is sitting behind the new computer'. How many words start with the letter 't' in the sentence.

Ex Output:

2