using System;

using System.Collections.Generic;

​

public class Solution

{

    //Input your values here

    private static int A = 3;

    private static int B = 1;

    private static int C = 2;

    //Code called Here

    public static void Main()

    {

        Console.Write(solution(A,B,C));

    }

​

    public static String solution(int A, int B, int C)

    {

        int[] numbers = {A, B, C};

        string[] letters = {"a", "b", "c"};

​

        string outputString = "";

        //Keep trying while there are letters to add

        while (numbers[0] > 0 || numbers[1] > 0 || numbers[2] > 0)

        {

            List<string> possibleLetters = new List<string>();

            //Try through A,B,C

            for (int i = 0; i < numbers.Length; i++)

            {

                while (numbers[i] > 0 && outputString.Substring(Math.Max(0, outputString.Length - 2)) != (letters[i] + letters[i]))

                {

                    outputString += letters[i];

                    numbers[i]--;

                    if (!possibleLetters.Contains(letters[i]))

                    {

                        possibleLetters.Add(letters[i]);

                    }

                }

            }

            //If no more letters can be added, stop trying

            if (possibleLetters.Count == 0)

            {

                break;

            }

        }

​

        return outputString;

    }

}