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

Input: Consider Input: Sentence: 'a pair of feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a white plate of food including rice and vegetables with beef'. How many words contain the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'an empty room is dimly lighted by a lamp in the corner'. How many words contain the letter 'd' in the sentence.


Output: 2