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: 'an ostrich in the foreground with giraffes behind eating from a feeder'. How many words start with the letter 'w' in the sentence.
1

Sentence: 'a group of people that are by and elephant'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'snow boarders and skiers at the top of a slope'. How many words start with the letter 's' in the sentence.

3