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

Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
4

Sentence: 'a black and white photo of a large clock on a building'. How many words contain the letter 't' in the sentence.
2

Sentence: 'blue and yellow train on a track with other tracks near a station'. How many words contain the letter 'u' in the sentence.

1