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 black and white photo of a man in the street feeding cats and dogs'. How many words start with the letter 'a' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a man stands and holds a brown teddy bear'. How many words start with the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a guitar case and some luggage sitting alongside a sitting bench'. How many words start with the letter 'c' in the sentence.

Ex Output:

1