import sys
readline=sys.stdin.readline
import random

class Rolling_Hash:
    def __init__(self,lst,base,mod):
        self.len=len(lst)
        self.base=base
        self.mod=mod
        self.rolling_hash=[None]*(self.len+1)
        self.rolling_hash[0]=0
        x=1
        for i in range(1,self.len+1):
            self.rolling_hash[i]=self.rolling_hash[i-1]+x*lst[i-1]
            self.rolling_hash[i]%=self.mod
            x*=self.base
            x%=self.mod
        x=pow(x,self.mod-2,self.mod)
        self.base_reverse=[None]*(self.len+1)
        self.base_reverse[self.len]=x
        for i in range(self.len-1,-1,-1):
            self.base_reverse[i]=self.base_reverse[i+1]*self.base%self.mod

    def __getitem__(self,i):
        if type(i)==int:
            a,b=i,i+1
        else:
            a,b=i.start,i.stop
            if a==None or a<-self.len:
                a=0
            elif self.len<=a:
                a=self.len
            elif a<0:
                a+=self.len
            if b==None or self.len<=b:
                b=self.len
            elif b<-self.len:
                b=0
            elif b<0:
                b+=self.len
        return (self.rolling_hash[b]-self.rolling_hash[a])*self.base_reverse[a]%self.mod

    def __len__(self):
        return self.len

S=readline().rstrip()
N=len(S)
base=random.randint(1<<50,1<<51)
S=Rolling_Hash([ord(s) for s in S],base,(1<<61)-1)
mod=10**9+7
dp=[0]*(N//2+1)
for i in range(N//2,-1,-1):
    dp[i]+=1
    dp[i]%=mod
    for j in range(i+1,N//2+1):
        if S[i:j]==S[N-j:N-i]:
            dp[i]+=dp[j]
            dp[i]%=mod
ans=dp[0]
print(ans)