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 skateboarder is performing a huge jump into the air'. How many words start with the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a woman in a white tshirt and black pants skiing down a small hill'. How many words start with the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a talbe with plates of food and a mason jar'. How many words start with the letter 'a' in the sentence.

Ex Output:

3