using System;
using System.Collections.Generic;

class Program
{
    static string InputPattern = "Input4";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("ABC");
            //5
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("DDDDDD");
            //0
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("XYZYX");
            //29
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        string S = InputList[0];

        var stk = new Stack<string>();
        stk.Push(S);
        var VisitedSet = new HashSet<string>() { S };

        while (stk.Count > 0) {
            string Popped = stk.Pop();

            for (int I = 0; I <= S.Length - 2; I++) {
                char[] NewCharArr = Popped.ToCharArray();
                NewCharArr[I] = Popped[I + 1];
                NewCharArr[I + 1] = Popped[I];
                string NewStr = new string(NewCharArr);
                if (VisitedSet.Add(NewStr))
                    stk.Push(NewStr);
            }
        }
        Console.WriteLine(VisitedSet.Count - 1);
    }
}