import sys


def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


S = S()
N = len(S)
if N % 2 == 1:
    S = S[:N//2]+S[N//2+1:]
    N -= 1

ord_S = [ord(s) for s in S]
mod = 10**9+7
r = 1234

A = [ord_S[0]]
for i in range(1,N):
    A.append((A[-1]*r+ord_S[i]) % mod)

power_r = [1]
for _ in range(N):
    power_r.append((power_r[-1]*r) % mod)


def RH(i,j):  # S[i:j+1]のローリングハッシュ
    if i == 0:
        return A[j]
    else:
        return (A[j]-A[i-1]*power_r[j-i+1]) % mod


dp = [0]*(N//2+1)  # dp[i] = S[i:N-i]に対する答え
dp[-1] = 1
for i in range(N//2-1,-1,-1):
    x = 1
    for j in range(i,N//2):
        if RH(i,j) == RH(N-1-j,N-1-i):
            x += dp[j+1]
            x %= mod
    dp[i] = x

ans = dp[0]
print(ans)