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

Ex Input:
Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of giraffes walk across an open area'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man riding skis out of a tunnel covered in snow'. How many words contain the letter 'c' in the sentence.

Ex Output:

1