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

[Q]: Sentence: 'there is a person awaiting to cross this street'. How many words contain the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a woman on a bike with an umbrella'. How many words contain the letter 'e' in the sentence.
[A]: 2


[Q]: Sentence: 'a man with skis walking by on a snow filled field'. How many words contain the letter 'f' in the sentence.
[A]:
2