using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class Program
{
    static void Main(string[] args)
    {
        string user = Console.ReadLine().ToUpper();
        StringBuilder result = new StringBuilder();
        int index = 0;
        while (true)
        {
            StringBuilder currentWord = new StringBuilder();
            StringBuilder currentRepeatCount = new StringBuilder();
            int repeatCount = 0;
            for (int i = index; i < user.Length; i++)
            {
                if (Char.IsDigit(user[i]))
                {

                    currentRepeatCount.Append(user[i]);
                    int j;
                    for (j = i+1; j < user.Length; j++)
                    {
                        if (Char.IsDigit(user[j]))
                        {
                            currentRepeatCount.Append(user[j]);
                        }
                        else
                            break;
                    }
                    repeatCount = int.Parse(currentRepeatCount.ToString());
                    index = j;
                    break;
                }
                else
                    currentWord.Append(user[i]);
            }

            for (int i = 0; i < repeatCount; i++)
            {
                result.Append(currentWord.ToString());
            }


            if (index >= user.Length-1)
            {
                break;
            }
        }
        HashSet<char> uniqueChars = new HashSet<char>(result.ToString().ToArray());
        Console.WriteLine($"Unique symbols used: {uniqueChars.Count}");
        Console.WriteLine($"{result.ToString()}");

    }
}