Rage Quit

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

namespace Anonymous_Vox
{
    class Program
    {
        static void Main(string[] args)
        {
            string regex = @"(?<str>[^0-9]+)(?<repeat>[0-9]+)";
            string input = Console.ReadLine().ToUpper();
            var matched = Regex.Matches(input, regex);
            var sb = new StringBuilder();


            foreach (Match m in matched)
            {

                for (int i = 0; i < int.Parse(m.Groups["repeat"].Value); i++)
                {
                    sb.Append(m.Groups["str"].Value);
                }
            }

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