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: 'two men on ski boards in the midst of a blizzard'. How many words start with the letter 's' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a black and white cat sits in a bathroom sink'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a wine carafe filled with wine bottle corks'. How many words start with the letter 'c' in the sentence.

Ex Output:

2