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 young woman is posing on a wooden table'. How many words start with the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a person standing on a tennis court holding a tennis racket'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'this is a cup of coffee and a bowl of bananas'. How many words start with the letter 'a' in the sentence.

Ex Output:

3