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Map-1 > mapAB2
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Modify and return the given map as follows: if the keys "a" and "b" are both in the map and have equal values, remove them both.

mapAB2({"a": "aaa", "b": "aaa", "c": "cake"}) → {"c": "cake"}
mapAB2({"a": "aaa", "b": "bbb"}) → {"a": "aaa", "b": "bbb"}
mapAB2({"a": "aaa", "b": "bbb", "c": "aaa"}) → {"a": "aaa", "b": "bbb", "c": "aaa"}

...Save, Compile, Run (ctrl-enter)

public Map<String, String> mapAB2(Map<String, String> map) { }

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