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

Sentence: 'a large clock tower under a grey cloudy sky'. How many words contain the letter 'l' in the sentence.
3

Sentence: 'a large red sign on a metal pole'. How many words contain the letter 'q' in the sentence.
0

Sentence: 'a blue airplane is flying above the white clouds'. How many words contain the letter 'o' in the sentence.

2