using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
using System.Threading;
using System.Runtime.CompilerServices;
using System.Diagnostics;
//using nint=System.Int32;
static class Program{
	const int mod=(int)1e9+7;
	static void Main(){
		Sc sc=new Sc();
		var s=("X"+sc.S).ToCharArray();
		int n=s.Length;
		var t=string.Join(",",s);
		var a=Ex.Ma(t);
		var dp=new long[n];
		dp[0]=1;
		for(int i = 0;i<4;i++) {
			for(int j = n-1;j>=0;j--) {
				dp[j]=0;
				for(int k = j-1;k>=0;k--) {
					if(i==2||a[(j<<1)-(j-k)+1]>=j-k){dp[j]+=dp[k];}
				}
			}
			dp[0]=0;
		}
		Console.WriteLine("{0}",dp[n-1]);
	}
}
static class Ex{
	static public int[] Za1(string s,int n){
		var a=new int[s.Length];
		for(int i=n+1,j=0;i<s.Length;){
			while(i+j<s.Length&&s[n+j]==s[i+j]){j++;}
			a[i]=j;
			if(j==0){i++;continue;}
			int k=1;
			while(i+k<s.Length&&k+a[n+k]<j){a[i+k]=a[n+k];k++;}
			i+=k;
			j-=k;
		}
		a[n]=s.Length-n;
		return a;
	}
	static public int[] Za2(string s,int n){
		var a=new int[s.Length];
		for(int i=n-1,j=0;i>=0;){
			while(i-j>=0&&s[n-j]==s[i-j]){j++;}
			a[i]=j;
			if(j==0){i--;continue;}
			int k=1;
			while(i-k>=0&&k+a[n-k]<j){a[i-k]=a[n-k];k++;}
			i-=k;
			j-=k;
		}
		a[n]=n+1;
		return a;
	}
	static public int[] Ma(string s){
		var a=new int[s.Length];
		for(int i=0,j=0;i<s.Length;){
			while(i-j>=0&&i+j<s.Length&&s[i-j]==s[i+j]){j++;}
			a[i]=j;
			int k=1;
			while(i-k>=0&&i+k<s.Length&&k+a[i-k]<j){a[i+k]=a[i-k];k++;}
			i+=k;
			j-=k;
		}
		return a;
	}
}
public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),int.Parse);}
	public int[] Ia3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),long.Parse);}
	public long[] La3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),long.Parse);}
	public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}
	public double[] Da3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),double.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
	public (T,T) Tp2<T>(){var s=Console.ReadLine().Split();return (Ct<T>(s[0]),Ct<T>(s[1]));}
	public (T1,T2) Tp2<T1,T2>(){var s=Console.ReadLine().Split();return (Ct<T1>(s[0]),Ct<T2>(s[1]));}
	public (T,T,T) Tp3<T>(){var s=Console.ReadLine().Split();return (Ct<T>(s[0]),Ct<T>(s[1]),Ct<T>(s[2]));}
	public (T1,T1,T2) Tp3<T1,T2>(){var s=Console.ReadLine().Split();return (Ct<T1>(s[0]),Ct<T1>(s[1]),Ct<T2>(s[2]));}
	private T Ct<T>(string s){return (T)Convert.ChangeType(s,typeof(T));}
}