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 kitchen with hard wood floors and metallic appliances'. How many words start with the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a picture of a very clean bed in the room'. How many words start with the letter 'r' in the sentence.
Example Output: 1

Example Input: Sentence: 'a table with legumes  cheese and vegetables on the top'. How many words start with the letter 'l' in the sentence.
Example Output:
1