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

Ex Input:
Sentence: 'a box filled with fresh fruit and vegetables'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'many people gather around a building with clocks'. How many words contain the letter 'e' in the sentence.

Ex Output:

2