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 man holding a nintendo wii game controller'. How many words start with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'some nice decorations left on a window pane'. How many words start with the letter 'l' in the sentence.
Example Output: 1

Example Input: Sentence: 'a young man in a wet suite is giving the thumbs up'. How many words start with the letter 't' in the sentence.
Example Output:
2