import java.io.*;
import java.util.*;
import java.math.*;
import java.awt.Point;

public class Main {
    InputStream is;
    PrintWriter out;
    String INPUT = "";

    long MOD = 1_000_000_007;
    int inf = 10000000;
    long[] memo;
    HashMap<Integer, Integer> map;
    List<Integer>[] adj;
    void solve()
    {
        char[] c = ns().toCharArray();
        int n = c.length;
        memo =  new long[n];
        Arrays.fill(memo,-1);
        map = new HashMap<>();
        adj = new List[n];
        for(int i = 0; i < n; i++){
            adj[i] = new ArrayList<>();
        }
        for(int i = 0; i <= n/2; i++){
            int flag = 0;
            int s = i;
            int g = n-1-i;
            while(s<g && s<=n/2 && g>=n/2){
                flag = 0;
                while(c[s]!=c[n-1-i]) s++;
                while(c[i]!=c[g]) g--;
                if(s>n-1-g){
                    g = n-1-s;
                }
                if(s<n-1-g){
                    s = n-1-g;
                }
                // out.println(s+" "+g);
                for(int j = i; j <= s; j++){
                    if(c[j]!=c[n-1-i-s+j]){
                        flag = 1;
                        break;
                    }
                }
                if(flag==0){
                    adj[i].add(s);
                }
                s++;
            }
        }
        for(int i : adj[2]){
            out.println(i);
        }

        long sum = f(c, 0, n-1)%MOD;
        out.println(sum);

    }

    long f(char[] c, int s, int t){
        int k = t-s;
        if(s>=t) return 1;
        if(memo[k]>=0){
            return memo[k];
        }
        if(s==t-1){
            if(c[s]==c[t]){
                memo[k] = 2;
                return 2;
            }
            else{
                memo[k] = 1;
                return 1;
            }
        }
        int flag = 0;
        long sum = 0;
        for(int i : adj[s]){
            if(i>=(s+t+1)/2) break;
            sum += f(c, i+1, t+s-i-1)%MOD;
            sum %= MOD;
        }
        // for(int i = s; i <= (s+t-1)/2; i++){
        //     flag = 0;
        //     for(int j = s; j <= i; j++){
        //         if(c[j]!=c[t-i+j]){
        //             flag = 1;
        //             break;
        //         }
        //     }
        //     if(flag==0){
        //         sum += f(c, i+1, t+s-i-1)%MOD;
        //         sum %= MOD;
        //     }
        // }
        sum += 1;
        sum %= MOD;
        memo[k] = sum;
        return sum;
    } 
   
    void run() throws Exception
    {
        is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
        out = new PrintWriter(System.out);
        
        long s = System.currentTimeMillis();
        solve();
        out.flush();
        if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
    }
    
    public static void main(String[] args) throws Exception { new Main().run(); }
    
    private byte[] inbuf = new byte[1024];
    private int lenbuf = 0, ptrbuf = 0;
    
    private int readByte()
    {
        if(lenbuf == -1)throw new InputMismatchException();
        if(ptrbuf >= lenbuf){
            ptrbuf = 0;
            try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
            if(lenbuf <= 0)return -1;
        }
        return inbuf[ptrbuf++];
    }
    
    private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
    private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
    
    private double nd() { return Double.parseDouble(ns()); }
    private char nc() { return (char)skip(); }
    
    private String ns()
    {
        int b = skip();
        StringBuilder sb = new StringBuilder();
        while(!(isSpaceChar(b) && b != ' ')){
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    
    private char[] ns(int n)
    {
        char[] buf = new char[n];
        int b = skip(), p = 0;
        while(p < n && !(isSpaceChar(b))){
            buf[p++] = (char)b;
            b = readByte();
        }
        return n == p ? buf : Arrays.copyOf(buf, p);
    }
    
    private char[][] nm(int n, int m)
    {
        char[][] map = new char[n][];
        for(int i = 0;i < n;i++)map[i] = ns(m);
        return map;
    }
    
    private int[] na(int n)
    {
        int[] a = new int[n];
        for(int i = 0;i < n;i++)a[i] = ni();
        return a;
    }
    
    private int ni()
    {
        int num = 0, b;
        boolean minus = false;
        while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
        if(b == '-'){
            minus = true;
            b = readByte();
        }
        
        while(true){
            if(b >= '0' && b <= '9'){
                num = num * 10 + (b - '0');
            }else{
                return minus ? -num : num;
            }
            b = readByte();
        }
    }
    
    private long nl()
    {
        long num = 0;
        int b;
        boolean minus = false;
        while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
        if(b == '-'){
            minus = true;
            b = readByte();
        }
        
        while(true){
            if(b >= '0' && b <= '9'){
                num = num * 10 + (b - '0');
            }else{
                return minus ? -num : num;
            }
            b = readByte();
        }
    }
    
    private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }

    static class ArrayUtils {
        public static void fill(double[][] array, double value) {
            for (double[] a : array) Arrays.fill(a, value);
        }
 
        public static void fill(double[][][] array, double value) {
            for (double[][] l : array) fill(l, value);
        } 
    }
}