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

Ex Input:
Sentence: 'a man buttering toast in his kitchen on the counter'. How many words contain the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'group of horses in a field with a pinto in the foreground'. How many words contain the letter 'h' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'three people are going snow boarding in the cold'. How many words contain the letter 'v' in the sentence.

Ex Output:

0