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

Ex Input:
Sentence: 'a close up of two people wearing ties'. How many words contain the letter 'o' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a child on the sand and a boat and some water'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'an assortment of different types of motorcycles in a showroom'. How many words contain the letter 'l' in the sentence.

Ex Output:

1