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 large horse is getting his hooves shaped'. How many words start with the letter 'h' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a person takes a picture of a reflection in a mirror in the dark'. How many words start with the letter 'p' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of a robot next to the toilet in the bathroom'. How many words start with the letter 'a' in the sentence.

Ex Output:

2