using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using static System.Console;
using static System.Convert;
using static System.Math;
using Pi = Pair<int, int>;
using PL = Pair<long, int>;
//using static System.Globalization.CultureInfo;
using System.Text;
class Program
{
    public static bool chmin<T>(ref T num, T val) where T : IComparable<T>
    { if (num.CompareTo(val) == 1) { num = val; return true; } return false; }
    public static bool chmax<T>(ref T num, T val) where T : IComparable<T>
    { if (num.CompareTo(val) == -1) { num = val; return true; } return false; }
    public static void swap<T>(ref T v1, ref T v2)
    { var t = v2; v2 = v1; v1 = t; }
    public static void Fail() => Fail("No");
    public static void Fail<T>(T s) { WriteLine(s); Console.Out.Close(); Environment.Exit(0); }
    static void Main(string[] args)
    {
        var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
        Console.SetOut(sw);
        var p = new Program();
        for (var i = 1; i > 0; --i) 
            p.Solve();
        Console.Out.Flush();
    }
    string str;
    RollingHash rh;
    ModInt[] memo;
    bool[] th;
    void Solve()
    {
        str = ReadLine();rh = new RollingHash(str);
        memo = new ModInt[str.Length];
        th = new bool[str.Length];
        WriteLine(dp(0, str.Length - 1));
    }
    ModInt dp(int l,int r)
    {
        if (r < l) return 1;
        if (th[l]) return memo[l];
        ModInt calc = 1;
        int le = l, ri = r;
        while(le<ri)
        {
            var h1 = rh.GetHash(l, le+1);
            var h2 = rh.GetHash(ri, r + 1);
            if (Enumerable.Range(0,RollingHash.BaseCount).All(v=> h1[v]==h2[v])) calc += dp(le + 1, ri - 1);
            le++;ri--;
        }
        th[l] = true;
        return memo[l] = calc;
    }
}

public struct ModInt
{
    public const long MOD = (int)1e9 + 7;
    //public const long MOD = 998244353;
    public long num { get; set; }
    public ModInt(long n = 0) { num = n; }
    private static ModInt[] _fac;//階乗
    private static ModInt[] _inv;//逆数
    private static ModInt[] _facrev;//1/(i!)
    public override string ToString()
        => num.ToString();
    public static ModInt operator +(ModInt l, ModInt r)
    {
        l.num += r.num;
        if (l.num >= MOD) l.num -= MOD;
        return l;
    }
    public static ModInt operator -(ModInt l, ModInt r)
    {
        l.num -= r.num;
        if (l.num < 0) l.num += MOD;
        return l;
    }
    public static ModInt operator *(ModInt l, ModInt r)
        => new ModInt(l.num * r.num % MOD);
    public static ModInt operator /(ModInt l, ModInt r)
        => l * Pow(r, MOD - 2);
    public static implicit operator long(ModInt l)
        => l.num;
    public static implicit operator ModInt(long n)
    {
        n %= MOD; if (n < 0) n += MOD;
        return new ModInt(n);
    }

    public static ModInt Pow(ModInt m, long n)
    {
        if (n == 0) return 1;
        if (n % 2 == 0) return Pow(m * m, n >> 1);
        else return Pow(m * m, n >> 1) * m;
    }

    public static void CombBuild(int n)
    {
        _fac = new ModInt[n + 1];
        _facrev = new ModInt[n + 1];
        _inv = new ModInt[n + 1];
        _inv[1] = 1;
        _fac[0] = _fac[1] = 1;
        _facrev[0] = _facrev[1] = 1;
        for (var i = 2; i <= n; i++)
        {
            _fac[i] = _fac[i - 1] * i;
            _inv[i] = MOD - _inv[MOD % i] * (MOD / i);
            _facrev[i] = _facrev[i - 1] * _inv[i];
        }
    }

    public static ModInt Fac(ModInt n)
        => _fac[n];
    public static ModInt Div(ModInt n)
        => _inv[n];
    public static ModInt FacRev(ModInt n)
        => _facrev[n];
    public static ModInt Part(ModInt n, ModInt r)
    {
        if (n < r) return 0;
        return _fac[n] * _facrev[n - r];
    }
    public static ModInt Comb(ModInt n, ModInt r)
    {
        if (n < r) return 0;
        if (n == r) return 1;
        var calc = _fac[n];
        calc = calc * _facrev[r];
        calc = calc * _facrev[n - r];
        return calc;
    }
}

public class RollingHash
{
    public string str { get; }
    private ulong[][] hashTable;
    private static ulong[][] pow;
    private static uint[] bases { get; }
    public static int BaseCount { get { return bases.Length; } }
    const ulong MASK30 = (1UL << 30) - 1;
    const ulong MASK31 = (1UL << 31) - 1;
    private const ulong MOD = (1UL << 61) - 1;
    public RollingHash(string str)
    {
        this.str = str;
        hashTable = Enumerable.Repeat(0, BaseCount).Select(_ => new ulong[str.Length + 1]).ToArray();
        for (var i = 0; i < BaseCount; i++)
            for (var j = 1; j <= str.Length; j++)
                hashTable[i][j] = CalcMod(Mul(hashTable[i][j - 1], bases[i]) + str[j - 1]);
    }
    static RollingHash()
    {
        var rnd = new Random(); int min = 150, max = int.MaxValue;
        bases = Enumerable.Repeat(0, 1).Select(_ => (uint)rnd.Next(min, max)).ToArray();
        pow = Enumerable.Repeat(0, BaseCount).Select(_ => new ulong[10001]).ToArray();
        for (var i = 0; i < BaseCount; i++)
            pow[i][0] = 1;
        for (var i = 0; i < BaseCount; i++)
            for (var j = 1; j < pow[i].Length; j++)
                pow[i][j] = Mul(pow[i][j - 1], bases[i]);
    }

    private static ulong Mul(ulong a,ulong b)
    {
        var au = a >> 31;
        var ad = a & MASK31;
        var bu = b >> 31;
        var bd = b & MASK31;
        var mid = ad * bu + au * bd;
        var midu = mid >> 30;
        var midd = (mid & MASK30);
        return CalcMod(au * bu * 2 + midu + (midd << 31) + ad * bd);
    }
    private static ulong CalcMod(ulong val)
    {
        val = (val & MOD) + (val >> 61);
        if (val > MOD) val -= MOD;
        return val;
    }

    public ulong[] GetHash(int l = 0, int r = -1)
    {
        if (r < 0) r = str.Length;
        var h = new ulong[BaseCount];
        for (var i = 0; i < BaseCount; i++)
            h[i] = CalcMod(hashTable[i][r] + MOD * ((1UL << 3) - 1) - Mul(hashTable[i][l], pow[i][r - l]));
        return h;
    }

}
public class Input
{
    public static string read => ReadLine().Trim();
    public static int[] ar => read.Split(' ').Select(int.Parse).ToArray();
    public static int num => ToInt32(read);
    public static long[] arL => read.Split(' ').Select(long.Parse).ToArray();
    public static long numL => ToInt64(read);
    public static T[] create<T>(int n, Func<int, T> f)
        => Enumerable.Repeat(0, n).Select(f).ToArray();
    public static char[][] grid(int h)
        => create(h, _ => read.ToCharArray());
    public static int[] ar1D(int n)
        => create(n, _ => num);
    public static long[] arL1D(int n)
        => create(n, _ => numL);
    public static string[] strs(int n)
        => create(n, _ => read);
    public static int[][] ar2D(int n)
        => create(n, _ => ar);
    public static long[][] arL2D(int n)
        => create(n, _ => arL);
    public static List<T>[] edge<T>(int n)
        => create(n, _ => new List<T>());
    public static T GetValue<T>(string g)
    {
        var t = typeof(T);
        if (t == typeof(int))
            return (T)(object)int.Parse(g);
        if (t == typeof(long))
            return (T)(object)long.Parse(g);
        if (t == typeof(string))
            return (T)(object)g;
        if (t == typeof(char))
            return (T)(object)char.Parse(g);
        if (t == typeof(double))
            return (T)(object)double.Parse(g);
        if (t == typeof(bool))
            return (T)(object)bool.Parse(g);
        return default(T);
    }
    public static void Make<T1, T2>(out T1 v1, out T2 v2)
    {
        v1 = Next<T1>();
        v2 = Next<T2>();
    }
    public static void Make<T1, T2, T3>(out T1 v1, out T2 v2, out T3 v3)
    {
        Make(out v1, out v2);
        v3 = Next<T3>();
    }
    public static void Make<T1, T2, T3, T4>(out T1 v1, out T2 v2, out T3 v3, out T4 v4)
    {
        Make(out v1, out v2, out v3);
        v4 = Next<T4>();
    }
    public static void Make<T1, T2, T3, T4, T5>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5)
    {
        Make(out v1, out v2, out v3, out v4);
        v5 = Next<T5>();
    }
    public static void Make<T1, T2, T3, T4, T5, T6>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5, out T6 v6)
    {
        Make(out v1, out v2, out v3, out v4, out v5);
        v6 = Next<T6>();
    }
    private static Queue<string> sc;
    public static T Next<T>() { sc = sc ?? new Queue<string>(); if (sc.Count == 0) foreach (var item in read.Split(' ')) sc.Enqueue(item); return GetValue<T>(sc.Dequeue()); }
    public static void Next<T>(ref T val) => val = Next<T>();
    public const long Inf = (long)1e18;
    public const double eps = 1e-6;
    public const string Alfa = "abcdefghijklmnopqrstuvwxyz";
    public const int MOD = 1000000007;
}

public class Pair<T1, T2> : IComparable<Pair<T1, T2>>
{
    public T1 v1 { get; set; }
    public T2 v2 { get; set; }
    public Pair() { v1 = Input.Next<T1>(); v2 = Input.Next<T2>(); }
    public Pair(T1 v1, T2 v2)
    { this.v1 = v1; this.v2 = v2; }

    public int CompareTo(Pair<T1, T2> p)
    {
        var c = Comparer<T1>.Default.Compare(v1, p.v1);
        if (c == 0)
            c = Comparer<T2>.Default.Compare(v2, p.v2);
        return c;
    }
    public override string ToString()
        => $"{v1.ToString()} {v2.ToString()}";
    public override bool Equals(object obj)
        => this == (Pair<T1, T2>)obj;
    public override int GetHashCode()
        => v1.GetHashCode() ^ v2.GetHashCode();
    public static bool operator ==(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) == 0;
    public static bool operator !=(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) != 0;
    public static bool operator >(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) == 1;
    public static bool operator >=(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) != -1;
    public static bool operator <(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) == -1;
    public static bool operator <=(Pair<T1, T2> p1, Pair<T1, T2> p2)
        => p1.CompareTo(p2) != 1;
}

public class Pair<T1, T2, T3> : Pair<T1, T2>, IComparable<Pair<T1, T2, T3>>
{
    public T3 v3 { get; set; }
    public Pair() : base() { v3 = Input.Next<T3>(); }
    public Pair(T1 v1, T2 v2, T3 v3) : base(v1, v2)
    { this.v3 = v3; }

    public int CompareTo(Pair<T1, T2, T3> p)
    {
        var c = base.CompareTo(p);
        if (c == 0)
            c = Comparer<T3>.Default.Compare(v3, p.v3);
        return c;
    }
    public override string ToString()
        => $"{base.ToString()} {v3.ToString()}";
}