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

Sentence: 'a long train is coming down some tracks'. How many words contain the letter 'w' in the sentence.
1

Sentence: 'a giraffe biting into a tree branch with great ferocity'. How many words contain the letter 'z' in the sentence.
0

Sentence: 'there are some pins a pin cushion and some scissors'. How many words contain the letter 'r' in the sentence.

3