public static int[,] DetonationArealMatrix(int[,] matrix)
        {
            int[,] m2 = new int[matrix.GetLength(0), matrix.GetLength(1)];
            for (int i = 0; i < matrix.GetLength(0); i++)
                for (int j = 0; j < matrix.GetLength(1); j++)
                    if (matrix[i, j] == 1)
                    {
                        m2[i, j] = 1;
                        if (i != 0)
                            m2[i - 1, j] = 1;
                        if (j != 0)
                            m2[i, j - 1] = 1;
                        if (i != matrix.GetLength(0) - 1)
                            m2[i + 1, j] = 1;
                        if (j != matrix.GetLength(1) - 1)
                            m2[i, j + 1] = 1;
                    }
            return m2;
        }
        public static int[,] DetonateMatrix(int[,] matrix)
        {
            int[,] m2=new int[matrix.GetLength(0),matrix.GetLength(1)];
            for (int i = 0; i < matrix.GetLength(0); i++)
                for (int j = 0; j < matrix.GetLength(1); j++)
                    m2[i, j] = 1 - matrix[i, j];
            return m2;
        }
        public static void PrintMatrix(int[,] matrix)
        {
            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                for (int j = 0; j < matrix.GetLength(1); j++)
                {
                    if (matrix[i, j] == 1)
                        Console.Write('O');
                    else Console.Write('.');
                }
                Console.WriteLine();
            }
        }
        static void Main(string[] args)
        {
            int[] arr = new int[3];
            arr = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            int R = arr[0];
            int C = arr[1];
            int N = arr[2];

            int[,] matrix = new int[R, C];
            for (int i = 0; i < R; i++)
            {
                string str = Console.ReadLine();
                for (int j = 0; j < str.Length; j++)
                    if (str[j] == 'O')
                        matrix[i, j] = 1;
            }

            if (N == 1)
                PrintMatrix(matrix);
            else if (N % 2 == 0)
                for (int i = 0; i < R; i++)
                    Console.WriteLine(new string('O', C));
            else
            {
                int[,] matrix2 = new int[R, C];
                matrix = DetonationArealMatrix(matrix);
                matrix = DetonateMatrix(matrix);

                matrix2 = DetonationArealMatrix(matrix);
                matrix2 = DetonateMatrix(matrix2);

                if (((N - 3) / 2) % 2 == 1)
                    PrintMatrix(matrix2);
                else PrintMatrix(matrix);
            }
        }