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

[EX Q]: Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'two motorcycle riders pose with motorcycles in front of a brick building'. How many words contain the letter 'c' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a brown cow sits in the middle of a grassy field'. How many words contain the letter 'c' in the sentence.
[EX A]:
1