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

[EX Q]: Sentence: 'a woman swinging a tennis racquet in the air'. How many words contain the letter 'z' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a tennis player holds a ball as if to throw it in the air to serve it'. How many words contain the letter 'o' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a shirtless man on surfboard riding a wave'. How many words contain the letter 'x' in the sentence.
[EX A]:
0