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

Input: Consider Input: Sentence: 'a young man dressed like a pirate on a skateboard'. How many words contain the letter 'a' in the sentence.

Output: 6

Input: Consider Input: Sentence: 'a line of very tall buildings next to a clock tower'. How many words contain the letter 'o' in the sentence.

Output: 4

Input: Consider Input: Sentence: 'a toilet sink and mirror with the reflection of a door and window'. How many words contain the letter 'e' in the sentence.
Output: 3