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.

Example Input: Sentence: 'a woman standing next to another woman in front of a tv'. How many words start with the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'a bed room with a dresser a wardrobe and a bed'. How many words start with the letter 'a' in the sentence.
Example Output: 5

Example Input: Sentence: 'a cat sticks his head in a pair sneakers'. How many words start with the letter 'h' in the sentence.
Example Output:
2