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

Example Input: Sentence: 'an older fighter plan sitting next to a group military men'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'donuts sitting on the side of large donut display'. How many words contain the letter 'b' in the sentence.
Example Output:
0