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

Input: Consider Input: Sentence: 'a modern looking bathroom has a toilet and a sink'. How many words contain the letter 'o' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a tree by a house has a traffic sign attached to it'. How many words contain the letter 'm' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a white park bench placed in the grass between two hedges'. How many words contain the letter 'b' in the sentence.


Output: 2