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 couple of giraffes that are walking around'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'group of boys in suits gathered with an audience'. How many words start with the letter 's' in the sentence.

Ex Output:

1