import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static long P = 1298719;
	public static long MOD = 1000000007;
	
	public static long[] rolling_hash(char[] ins){
		long[] hash = new long[ins.length];
		
		hash[0] = ins[0];
		for(int i = 1; i < ins.length; i++){
			hash[i] = hash[i - 1] * P;
			hash[i] %= MOD;
			hash[i] += ins[i];
			hash[i] %= MOD;
		}
		
		return hash;
	}
	
	public static long mod_pow(long a, long p){
		if(p == 0){ return 1; }
		if(p == 1){ return a % MOD; }
		if(p % 2 == 1){
			return (mod_pow(a, p - 1) * a) % MOD;
		}else{
			final long ret = mod_pow(a, p / 2) % MOD;
			return (ret * ret) % MOD;
		}
	}
	
	public static long calc_hash(long[] hash, int begin, int end){
		final long from_end = hash[end - 1];
		final long from_begin = (hash[begin] * mod_pow(P, (end - begin) - 1)) % MOD;
		return (MOD + (from_end - from_begin)) % MOD;
	}
	
	public static long dfs(int offset, char[] ins, long[] memo, long[] hash){
		if(memo[offset] >= 0){
			return memo[offset];
		}
		
		long ret = 1;
		
		LOOP:
		for(int len = 1; ;len++){
			final int fst_begin = offset;
			final int snd_end = ins.length - offset;
			
			final int snd_begin = snd_end - len;
			final int fst_end = fst_begin + len;
			
			if(fst_end > snd_begin){ break; }
			/*
			System.out.println(fst_begin + " " + snd_begin + " " + len);
			System.out.println("[" + fst_begin + ", " + fst_end + "]");
			//*/
			
			/*
			for(int i = 0; i < len; i++){
				final int fst = fst_begin + i;
				final int snd = snd_begin + i;
				
				if(ins[fst] != ins[snd]){ continue LOOP; }
			}
			//*/
			if(len != 1){
				final long fst_hash = calc_hash(hash, fst_begin, fst_end);
				final long snd_hash = calc_hash(hash, snd_begin, snd_end);
				//System.out.println(fst_hash + " " + snd_hash);
				if(fst_hash != snd_hash){ continue; }
			}else if(ins[fst_begin] != ins[snd_begin]){
				continue;
			}
			
			//System.out.println(offset + " " + fst_begin + " " + snd_begin + " " + len);
			ret += dfs(offset + len, ins, memo, hash);
			ret %= MOD;
		}
		
		return memo[offset] = ret;
	}
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final char[] ins = sc.next().toCharArray();
		
		long[] memo = new long[ins.length];
		Arrays.fill(memo, -1);
		
		System.out.println(dfs(0, ins, memo, rolling_hash(ins)));
	}
}