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: 'two men holding electronic devices compete in an interactive game'. How many words start with the letter 't' in the sentence.
Example Output: 1

Example Input: Sentence: 'dude in shades sits and eats a hotdog'. How many words start with the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'someone flying a red kite in a crowded park'. How many words start with the letter 'a' in the sentence.
Example Output:
2