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

[EX Q]: Sentence: 'an orange cat is lounging on a gray couch'. How many words contain the letter 'c' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'two ducks are standing in the grass'. How many words contain the letter 'y' in the sentence.
[EX A]:
0