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

Ex Input:
Sentence: 'a skier skiing on the mountain with trees behind him'. How many words contain the letter 'z' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a young girl is brushing her teeth  in a bathroom'. How many words contain the letter 'f' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the floor lamp is reflecting on the table in front of it'. How many words contain the letter 'g' in the sentence.

Ex Output:

1