frew@mclean.com stack-1

Non-empty: stackHead7  stackHeadNot3  stackHeadPlus8  stackHead22 

Empty: stackHead7b  stackHeadNot3b  stackHeadPlus8b  stackHead22b 

Start all problems with
    Stack<Integer> stack = new Stack<Integer>();
    stack.addAll(list);

End all problems with
    return new ArrayList<Integer>(stack);
Authoring docs

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