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: 'funny close up of a man staring cross eyed at a remote control in his mouth'. How many words start with the letter 'c' in the sentence.
Example Output: 3

Example Input: Sentence: 'a clock tower sitting on the side of a walkway'. How many words start with the letter 't' in the sentence.
Example Output: 2

Example Input: Sentence: 'a large and small elephant in an enclosed area with water tree logs and rock formations'. How many words start with the letter 'l' in the sentence.
Example Output:
2