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

Ex Input:
Sentence: 'a train that is pulling into the station'. How many words contain the letter 't' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'this bus waits at a bus station for passengers to board'. How many words contain the letter 'e' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'people taking photos of a boat moored by a green lawn'. How many words contain the letter 't' in the sentence.

Ex Output:

3