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

Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.
3

Sentence: 'a group of people skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.
2

Sentence: 'a group of women are laughing as they play wii'. How many words contain the letter 'y' in the sentence.

2