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 flat screen tv with an image of a baseball player holding a baseball bat'. How many words start with the letter 'a' in the sentence.
Example Output: 4

Example Input: Sentence: 'a baseball player gets ready to run to first base'. How many words start with the letter 't' in the sentence.
Example Output: 2

Example Input: Sentence: 'an empty bench in front of a building'. How many words start with the letter 'e' in the sentence.
Example Output:
1