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

Ex Input:
Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'two people eating a hot dog as if its a competition'. How many words contain the letter 'c' in the sentence.

Ex Output:
1