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

Ex Input:
Sentence: 'a couple of people that are on some skateboards'. How many words contain the letter 'o' in the sentence.

Ex Output:
6

Ex Input:
Sentence: 'two women in an arena with a cow'. How many words contain the letter 'u' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a line of male cross country skiers on a trail'. How many words contain the letter 'u' in the sentence.

Ex Output:
1