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

Ex Input:
Sentence: 'an acoustic guitar is shown laying on a bed'. How many words contain the letter 'l' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a stir fry consisting of rice broccoli and other vegetables'. How many words contain the letter 'e' in the sentence.

Ex Output:
3

Ex Input:
Sentence: 'kites with long streamers are flying above a crowded beach'. How many words contain the letter 'z' in the sentence.

Ex Output:
0