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 large group of men with bats in a dugout'. How many words start with the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a baseball player prepares to swing at a pitch'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman is holding an open red umbrella over her head'. How many words start with the letter 'o' in the sentence.

Ex Output:

2


