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

Ex Input:
Sentence: 'a girl laying on a couch with a bird on her head'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a modern looking bathroom has a toilet and a sink'. How many words contain the letter 'o' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a man riding a wave on top of a white surfboard'. How many words contain the letter 'm' in the sentence.

Ex Output:

1