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 man sitting at a cafeteria table with his laptop and looking at his cell phone'. How many words start with the letter 'h' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a man wearing a beret while using a laptop computer'. How many words start with the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a child sits next to a stuffed toy'. How many words start with the letter 'a' in the sentence.

Ex Output:

2