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: 'three chefs talking to each other at a bar'. How many words start with the letter 't' in the sentence.
Example Output: 3

Example Input: Sentence: 'a bedroom with wooden floors and a striped blanket on the bed'. How many words start with the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'there is a pizza pie on a table with many toppings on it'. How many words start with the letter 'o' in the sentence.
Example Output:
2