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: 'the bearded man is posing in a suit'. How many words start with the letter 'a' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'man with a thought bubble coming from his head'. How many words start with the letter 'h' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'three people with backpacks skiing in the mountains'. How many words start with the letter 'p' in the sentence.

Ex Output:

1