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

Sentence: 'some kids are all taking a photograph together'. How many words contain the letter 'e' in the sentence.
3

Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.
0

Sentence: 'a man is riding on a surfboard at the beach'. How many words contain the letter 'a' in the sentence.

6