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

[Q]: Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.
[A]: 3


[Q]: Sentence: 'a pair of feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.
[A]: 5


[Q]: Sentence: 'the tent has fell in the blue water'. How many words contain the letter 'u' in the sentence.
[A]:
1