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 man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'the table is covered with many different vegetables'. How many words contain the letter 'o' in the sentence.

Ex Output:

1