using System;
using System.Text.RegularExpressions;
using System.Linq;

namespace exam_prep_III_3
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();

            var regex = "([^0-9]+)(\\d+)";

            var matches = Regex.Matches(line, regex);

            var strings = string.Join("",matches.Select(x => x.Groups[1].Value).ToArray());

            Console.WriteLine($"Unique symbols used: {strings.ToLower().Distinct().Count()}");

            foreach (Match match in matches)
            {
                var text = match.Groups[1].Value;
                var number = int.Parse(match.Groups[2].Value);

                Console.Write(string.Concat(Enumerable.Repeat(text.ToUpper(), number)));
            }
        }
    }
}