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

Ex Input:
Sentence: 'a man driving with his dog in the back seat'. How many words contain the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a counter top that has many pots and ingredients on it'. How many words contain the letter 'b' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'many people on a field playing baseball'. How many words contain the letter 's' in the sentence.

Ex Output:

1