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

Input: Consider Input: Sentence: 'a train that is pulling into the station'. How many words contain the letter 't' in the sentence.

Output: 5

Input: Consider Input: Sentence: 'a woman standing on a beach near the water'. How many words contain the letter 'n' in the sentence.

Output: 4

Input: Consider Input: Sentence: 'many people walk under flags on a crowded sidewalk'. How many words contain the letter 'x' in the sentence.
Output: 0