How to realize the unusual words in two sentences by LeetCode
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Topic description
Give two sentences An and B. A sentence is a string of words separated by spaces. Each word consists of only lowercase letters. )
If a word appears only once in one sentence, but not in the other, then the word is not common.
Returns a list of all the less commonly used words.
You can return the list in any order.
Example 1:
Input: a = "this apple is sweet", B = "this apple is sour" output: ["sweet", "sour"]: example 2: input: a = "apple apple", B = "banana" output: ["banana"]
Tip:
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