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: 'looking through a detailed window at a clock'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a woman wearing gloves that has a kite'. How many words start with the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a baseball player holding a baseball bat during a game'. How many words start with the letter 'a' in the sentence.

Ex Output:

3