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

namespace Rage_Quit
{
    class Program
    {
        static List<char> arr = new List<char>();
        static List<char> arrCharNumber = new List<char>();
        static List<char> sbLetter = new List<char>();
        static StringBuilder sbDigits = new StringBuilder();

        static void AddLetter(int valueDigit)
        {
            for (int j = 0; j < valueDigit; j++)
            {
                for (int i = 0; i < sbLetter.Count; i++)
                {
                    arr.Add(sbLetter[i]);
                }
            }
        }
        static void PrintSymbols()
        {
            foreach (var val in arr)
            {
                Console.Write("{0}", val);
            }
            Console.WriteLine();
        }

        static void Main()
        {
            string str = Console.ReadLine().ToUpper();
            int digit;

            for (int i = 0; i < str.Length; i++)
            {
                if (Char.IsLetter(str[i]) || !Char.IsLetterOrDigit(str[i]))
                {
                    sbLetter.Add(str[i]);
                }
                else
                {
                    sbDigits.Append(str[i]);
                    if (i < str.Length - 1 && !Char.IsDigit(str[i + 1]) || (i == str.Length - 1))
                    {
                        digit = Convert.ToInt32(sbDigits.ToString());
                        AddLetter(digit);
                        sbLetter.Clear();
                        sbDigits.Clear();
                    }
                }
                if (arrCharNumber.Contains(str[i]) || Char.IsDigit(str[i]))
                {
                    continue;
                }
                else
                {
                    arrCharNumber.Add(str[i]);
                }
            }
            Console.WriteLine("Unique symbols used: {0}", arrCharNumber.Count);
            PrintSymbols();
        }
    }
}