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

Sentence: 'a man riding waves on his surfboard in the ocean'. How many words contain the letter 'v' in the sentence.
1

Sentence: 'a large brown dog with a white deflated ball in its mouth'. How many words contain the letter 'm' in the sentence.
1

Sentence: 'a couple of zebra standing next to each other on a field'. How many words contain the letter 's' in the sentence.

1