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

Example Input: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.
Example Output: 1

Example Input: Sentence: 'the laptop is disassembled with the parts piled on the outer shell'. How many words contain the letter 'v' in the sentence.
Example Output: 0

Example Input: Sentence: 'man on surf board with arms in the air riding the waves'. How many words contain the letter 'w' in the sentence.
Example Output:
2