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

Ex Input:
Sentence: 'an individual poses for a picture beside a bright window'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'living room that has boxes packed for moving'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the flock of birds is flying toward the domed building'. How many words contain the letter 'w' in the sentence.

Ex Output:

1