In this task, you need to count the number of words in a sentence that contain the given letter

Sentence: 'a large field is next to a river'. How many words contain the letter 'j' in the sentence.
0

Sentence: 'a clock tower next to a building in a city'. How many words contain the letter 'a' in the sentence.
3

Sentence: 'a white clock on a post and a tree and some buildings'. How many words contain the letter 'b' in the sentence.

1