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

Sentence: 'a small terrier stands in the open suitcase ready to go'. How many words contain the letter 'l' in the sentence.
1

Sentence: 'a couple sitting on seats on a train'. How many words contain the letter 'z' in the sentence.
0

Sentence: 'two zebras standing among foliage at a zoo'. How many words contain the letter 'm' in the sentence.

1