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

Ex Input:
Sentence: 'an airplane in the sky trailing condensation'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a picnic table that has an umbrella that has lights'. How many words contain the letter 't' in the sentence.

Ex Output:

4