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

Ex Input:
Sentence: 'a smiling man holds out a card with color swatches'. How many words contain the letter 'i' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a person standing in line for food at a food truck'. How many words contain the letter 'c' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'an skateboarder practicing his moves on the indoor course'. How many words contain the letter 'i' in the sentence.

Ex Output:
3