using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Console;
namespace yuki_432
{
    class Program
    {
        static void Main(string[] args)
        {
            var T = scan;
            var sb = new StringBuilder();
            for (int i = 0; i < T; i++)
            {
                var S = ReadLine();
                
                var d = S;
                var m = "";
                while (d.Length > 1)
                {
                    for (int j = 1; j < d.Length; j++)
                    {
                        var k = int.Parse(d[j].ToString()) + int.Parse(d[j - 1].ToString());
                        m += (k % 10 + (k / 10) % 10).ToString();             
                    }
                    d = m;
                    m = "";

                }
                sb.AppendLine(d);
            }
            Write(sb);
        }

        static int scan { get { return int.Parse(ReadLine()) ; } }
    }
}