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

[EX Q]: Sentence: 'four white and blue street signs on a wooden pole'. How many words contain the letter 'u' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a sleek and pointy fighter jet flying in the sky'. How many words contain the letter 'f' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a laptop computer next to a lamp and a musical keyboard'. How many words contain the letter 'd' in the sentence.
[EX A]:
2