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

Ex Input:
Sentence: 'a close up of two black cows grazing the grass'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'the bathroom has a shower toilet toilet paper and a sink with leaves in it'. How many words contain the letter 'v' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man and a woman riding surfboards side by side on a wave'. How many words contain the letter 'g' in the sentence.

Ex Output:

1