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

Sentence: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.
4

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: 'two large cats drinking water from a toilet'. How many words contain the letter 'q' in the sentence.

0