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

Ex Input:
Sentence: 'an orange cat is lounging on a gray couch'. How many words contain the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a large herd of farm animals are with a cowboy'. How many words contain the letter 'l' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman in a wheelchair is about to play tennis'. How many words contain the letter 'r' in the sentence.

Ex Output:

1