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

Ex Input:
Sentence: 'a blue traffic sign next to a parked car on a city street'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a woman poses with a large teddy bear'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a giraffe is walking while the car passes by'. How many words contain the letter 'c' in the sentence.

Ex Output:

1