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: 'a person on skis goes across a snowy slope'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'some unfinished looking wood is in a white bathroom'. How many words start with the letter 'w' in the sentence.
2

Sentence: 'a golfer hitting a golf ball at a hole on the green'. How many words start with the letter 'g' in the sentence.

3