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

Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.
0

Sentence: 'two men are dancing in a parade with brown umbrellas'. How many words contain the letter 'r' in the sentence.
4

Sentence: 'small living room with a fireplace sitting in the middle of it'. How many words contain the letter 's' in the sentence.

2