#include <iostream>
#include <vector>
#include <string>
using namespace std;
using ll = long long int;
constexpr ll MOD = 1'000'000'007;

vector<int> Z_Algorithm(const string &s){
    vector<int> a(s.size());
    a[0] = s.size();
    int i = 1, j = 0;
    while(i < s.size()){
        while(i+j < s.size() && s[j] == s[i+j]) ++j;
        a[i] = j;
        if(j == 0){
            ++i; continue;
        }
        int k = 1;
        while(i+k < s.size() && k+a[k] < j){
            a[i+k] = a[k], ++k;
        }
        i += k; j -= k;
    }
    return a;
}

struct Solver{
    const string s;
    vector<vector<int>> mem;
    Solver(string &s): s(s), mem(vector<vector<int>>(s.size(), vector<int>(s.size()))){
        int l = s.size();
        for(int i = 0; l-i*2 > 0; i++){
            // cerr << s.substr(i, l-i*2) << endl;
            auto vec = Z_Algorithm(s.substr(i, l-i*2));
            for(int j = 0; j < vec.size(); j++){
                mem[i][i+j] = vec[j];
            }
        }
    }

    ll f(int start, int end){
        ll ans = 1;
        for(int i = 0; i+start < end-i; i++){
            if(mem[start][end-i] == i+1){
                ans += f(start+i+1, end-i-1);
                ans %= MOD;
            }
        }
        // for(int i = 0; i < s.size(); i++) cerr << mem[start][i] << " ";
        // cerr << endl;
        // cerr << start << " " << end << " " << ans << endl;
        return ans;
    }

    void solve(){
        cout << f(0, s.size()-1) << endl;
    }
};

int main(){
    string s;
    cin >> s;
    Solver sol(s);
    sol.solve();
    return 0;
}