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

[Q]: Sentence: 'a smiling woman wearing a hat holds up a snowboard'. How many words contain the letter 'b' in the sentence.
[A]: 1

[Q]: Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.
[A]: 3

[Q]: Sentence: 'a shot of a man holding luggage going up an escalator'. How many words contain the letter 'u' in the sentence.
[A]:
2