#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <stdio.h>
using namespace std;
#define int long long
int MOD = 1000000007;
signed main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	string S;
	cin >> S;
	//S.clear();
	
	int N = S.size();
	vector<int> A(N);
	int res = 0;
	vector<int> dp((N / 2) + 2, 0);
	dp[0] = 1;
	int nn = N;
	for (int x = 0; x < nn / 2; x++) {
		N = S.size();
		A[x] = S.size();
		int i = 1, j = 0;
		for (int i = 0; i < N; i++) {
			A[i] = 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;
		}
		S.pop_back();
		S.erase(S.begin());
	
		for (int k = ((N - 1) / 2) + 1; k < N; k++) {
			if (A[k] == N - k) {
				//cerr << x << " " << x + N - k << endl;
				dp[x + N - k] = (dp[x + N - k] + dp[x]) % MOD;
			}
		}
		//cerr << dp[x] << endl;
		//res = (res + dp[x]) % MOD;
	}
	for (int i = 0; i < dp.size(); i++) {
		//cerr << dp[i] << " ";
		res = (res + dp[i]) % MOD;
	}
	//cerr << endl;
	cout << res << endl;
}