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;
static class Program{
	const int mod=(int)1e9+7;
	static void Main(){
		Sc sc=new Sc();
		var t=sc.S;
		int m=(t.Length)>>1;
		var ans=new int[t.Length];
		ans[m]=1;
		int o=t.Length&1;
		for(int i = m-1;i>=0;i--) {
			var z=Ex.Za1(t,i);
			ans[t.Length-i-1]=1;
			ans[i]=1;
			for(int j = m+o;j<t.Length-i;j++) {
				if(z[j]>=t.Length-i-j){ans[i]=(ans[i]+ans[t.Length-j])%mod;}
			}
		}
		Console.WriteLine("{0}",ans[0]);
	}
}
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;
	}
}

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(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),int.Parse);}
	public int[] Ia3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(int a){return Array.ConvertAll((a.ToString()+" "+Console.ReadLine()).Split(),long.Parse);}
	public long[] La3(bool a,int b,bool c,int d){return Array.ConvertAll(((a?b.ToString()+" ":"")+Console.ReadLine()+(c?" "+d.ToString():"")).Split(),long.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;}
}