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

Ex Input:
Sentence: 'two giraffes with their heads in the tree'. How many words contain the letter 'o' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a red and green fire hydrant in son a sidewalk'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a red car parked with a gas pump inserted into it'. How many words contain the letter 'l' in the sentence.

Ex Output:

0