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

Ex Input:
Sentence: 'a teddy bear that is sitting up on the ground'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a group of people on a beach beneath a cloudy sky'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two pieces of decorated luggage are sitting next to each other'. How many words contain the letter 'a' in the sentence.

Ex Output:

4