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

Ex Input:
Sentence: 'there is a plate if food with broccoli fish and a baked potato'. How many words contain the letter 'k' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a line of very tall buildings next to a clock tower'. How many words contain the letter 'o' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'cabbage tomatoes cucumbers parsley and other vegetables sits on a white surface'. How many words contain the letter 'o' in the sentence.

Ex Output:

3