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

Example Input: Sentence: 'an asian man ad woman on their cell phones'. How many words contain the letter 'i' in the sentence.
Example Output: 2

Example Input: Sentence: 'an lshaped desk covered in various computers and accessories'. How many words contain the letter 'e' in the sentence.
Example Output: 5

Example Input: Sentence: 'some very pretty zebras together in a field'. How many words contain the letter 'f' in the sentence.
Example Output:
1