using System;

using System.Linq;

using System.Text;

​

class RageQuit

{

    static void Main()

    {

        char[] input = Console.ReadLine().ToUpper().ToCharArray();

        string toBeRepeated = "";

        string repetition = "";

        StringBuilder result = new StringBuilder();

​

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

        {

            if (char.IsDigit(input[i]))

            {

                repetition += input[i].ToString();

​

                if (i + 1 < input.Length && char.IsDigit(input[i + 1]))

                {

                    repetition += input[i + 1].ToString();

                }

​

                int counter = int.Parse(repetition);

​

                if (counter == 0) // Don't need to add that to the result.

                {

                    toBeRepeated = "";

                    repetition = "";

                }

                else

                {

                    for (int j = 0; j < counter; j++)

                    {

                        result.Append(toBeRepeated);

​

                        if (j == counter - 1) // If we are at the last iteration we clear the strings.

                        {

                            toBeRepeated = "";

                            repetition = "";

                        }

                    }

                }

            }

            else

            {

                toBeRepeated += input[i];

            }

        }

​

        int uniqueSymbols = result.ToString().Distinct().Count();

        string resultString = result.ToString();

​

        Console.WriteLine($"Unique symbols used: {uniqueSymbols}");

        Console.WriteLine(resultString);

    }

}