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 man in an apron working in front of a fireplace'. How many words start with the letter 'a' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a husky is sleeping while wearing a green bandana'. How many words start with the letter 's' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a view of a building in a country different than the us'. How many words start with the letter 'i' in the sentence.

Ex Output:

1