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

Ex Input:
Sentence: 'a group of bears sitting next to each other on a sidewalk'. How many words contain the letter 't' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'two children work at a desk on laptop computers'. How many words contain the letter 'c' in the sentence.

Ex Output:

2