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

Ex Input:
Sentence: 'a sandwich shop with cars parked in front of it'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


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: 'a giraffe drinking water from a pond with its legs spread'. How many words contain the letter 'h' in the sentence.

Ex Output:

1