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 close up of three older men standing near one another'. How many words start with the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'old junked blue truck in a field between two dead trees'. How many words start with the letter 't' in the sentence.
Example Output: 3

Example Input: Sentence: 'some male soccer players are playing soccer on a field'. How many words start with the letter 'a' in the sentence.
Example Output:
2