import sys
sys.setrecursionlimit(10**7)
from functools import lru_cache

@lru_cache(maxsize=None)
def f(start, goal):
    val = 1
    ind = 1
    while start + ind < goal - ind:
        if R.get(start, start + ind) == R.get(goal - ind, goal):
            val += f(start + ind, goal - ind)
        ind += 1  
    return val

class RollingHash():
    def __init__(self, s):
        self._mod = 2 ** 64 - 1
        self._base = 4649
        
        n = len(s)
        self.h = [0] * (n + 1)
        self.pw = [1] * (n + 1)
 
        for i in range(n):
            self.h[i + 1] = self.h[i] * self._base + ord(s[i])
            self.h[i + 1] %= self._mod
 
        for i in range(n):
            self.pw[i + 1] = self.pw[i] * self._base
            self.pw[i + 1] %= self._mod
            
        """
        s[l:r]のhash値
        """
    def get(self, l, r):
        return (self.h[r] - self.h[l] * self.pw[r - l]) % self._mod
    
S = input()
R = RollingHash(S)
print(f(0, len(S)))