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.

Sentence: 'bed with white blanket and two pillows with a light glowing from under and behind the bed'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a man riding on top of a wave on a surfboard'. How many words start with the letter 'o' in the sentence.
3

Sentence: 'someone surfing the waves on their surf board'. How many words start with the letter 's' in the sentence.

3