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CodingBat code practice



Create a method public String findBackToBackLetters(String word) that will look for repeated letters in word and return those. So apple would return "pp", "cat" would "", "mississippi" would return "sssspp"

findBackToBackLetters("apple") → "pp"
findBackToBackLetters("cat") → ""
findBackToBackLetters("mississippi") → "sssspp"

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

public String findBackToBackLetters(String word){ }

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