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

[Q]: Sentence: 'the street corner is flooded deep with water'. How many words contain the letter 'f' in the sentence.
[A]: 1


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


[Q]: Sentence: 'bus parked next to a side walk on the road'. How many words contain the letter 'd' in the sentence.
[A]:
3