using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string str=Console.ReadLine();

        LengthOfLongetsubstring(str);

        //Console.WriteLine("Hello World");

    }

    internal static void LengthOfLongetsubstring(string str)

    {

        List<string> lststr=new List<string>();

        for(int i=0;i<str.Length-1;i++)

        {

           for(int start=0;start<=  str.Length-i;start++){

                string substr=str.Substring(start,i);

               if(UniqueSubstring(substr))

               {

                     lststr.Add(substr);

               }

           }

        }

        var str1=lststr.OrderByDescending(s => s.Length).First();

        Console.WriteLine("The sub string is : " + str1 + " and it's length : "+ str1.Length);

    }

    internal static bool UniqueSubstring(string str)

    {

         for (int i = 0; i < str.Length; i++) 

            for (int j = i + 1; j < str.Length; j++) 

                if (str[i] == str[j]) 

                    return false; 

        // If no duplicate characters 

        // encountered, return true 

        return true; 

    }

}