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 shot of the tops of several tall buildings in a city'. How many words start with the letter 'a' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a toddler looking up at a colorful kite in the sky'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a meeting room with several people and laptops discussing a project'. How many words start with the letter 's' in the sentence.

Ex Output:

1