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

Ex Input:
Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'this is a portion of a painting showing a banana and an orange'. How many words contain the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a shot of a baseball game playing in front of the crowd'. How many words contain the letter 'o' in the sentence.

Ex Output:

5