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

[EX Q]: Sentence: 'a teenager and child are fighting for a frisbee'. How many words contain the letter 'm' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a line of very tall buildings next to a clock tower'. How many words contain the letter 'o' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a small room with just a toilet and a door'. How many words contain the letter 't' in the sentence.
[EX A]:
3