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: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.
Example Output: 1

Example Input: Sentence: 'a onecart train coming down the railroad tracks'. How many words contain the letter 'k' in the sentence.
Example Output:
1