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 bunch of people in a metropolitan area with umbrellas walking on a sidewalk next to buildings'. How many words start with the letter 'p' in the sentence.
1

Sentence: 'a plate with potato pancakes and a fork'. How many words start with the letter 'p' in the sentence.
3

Sentence: 'an image of a man riding ocean waves on a surfboard'. How many words start with the letter 'o' in the sentence.

3