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

Ex Input:
Sentence: 'two women in an arena with a cow'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a girl is ready to serve the ball on a clay court'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a surfer in a black wet suit crouches on his white surfboard and rides a small wave'. How many words contain the letter 'z' in the sentence.

Ex Output:

0