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 skateboarder performing tricks under the lights at night'. How many words start with the letter 'u' in the sentence.
Example Output: 1

Example Input: Sentence: 'a take out sandwich and two bottles of soda'. How many words start with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'chopped ingredients in little bowls lined up on a kitchen counter'. How many words start with the letter 'k' in the sentence.
Example Output:
1