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: 'giraffe brought in ground next to some trees in exhibit'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a counter topped with vases in front of a window'. How many words start with the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a young girl is eating a hot dog on a bun'. How many words start with the letter 'd' in the sentence.

Ex Output:

1