#include "bits/stdc++.h"
using namespace std;

#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl

typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
const int inf = 1000000001;
const ll INF = 1e18 * 2;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<< fixed<<p<<endl;
int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };

string s;
int n;
vl dp(10010, -1);

ll dfs(int i) {
	if (dp[i] != -1) {
		return dp[i];
	}
	if (n % 2 && i == n / 2) {
		dp[i] = 1;
		return 1;
	}
	ll res = 1;
	for (int left = i, right = n - 1 - i; left < right; left++, right--) {
		if (s.substr(i, left - i + 1) == s.substr(right, left - i + 1)) {
			res += dfs(left + 1);
			res %= MOD;
		}
	}
	dp[i] = res;
	return res;
}

int main() {
	cin >> s;
	n = s.size();
	ll ans = dfs(0);
	cout << ans << endl;
}