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

Ex Input:
Sentence: 'man holding remote control for video game system'. 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 beautiful young lady smiling while talking on a phone'. How many words contain the letter 'z' in the sentence.

Ex Output:

0