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

[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: 'there are trains that are on the train track'. How many words contain the letter 'z' in the sentence.
[A]: 0


[Q]: Sentence: 'two small brown bears laying down by a fence'. How many words contain the letter 't' in the sentence.
[A]:
1