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

[Q]: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.
[A]: 4


[Q]: Sentence: 'the zebra is showing his rear end to the camera'. How many words contain the letter 'r' in the sentence.
[A]: 3


[Q]: Sentence: 'a pan with batter in it is sitting in a dirty little oven'. How many words contain the letter 'x' in the sentence.
[A]:
0