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

Ex Input:
Sentence: 'martha stewart holding a fluffy siamese cat on her arms'. How many words contain the letter 'a' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'guys in a living room playing a wii bowling game'. How many words contain the letter 'c' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a bathroom with a shower curtain printed with a browser error message'. How many words contain the letter 'o' in the sentence.

Ex Output:

4