import sys,collections
mod = 10**9+7
sys.setrecursionlimit(mod)
s= input()
d = collections.defaultdict(lambda: 1)
def DFS(s):
    if s in d:
        return d[s]
    rh1,rh2 = 0,0
    for i in range(1,len(s)//2+1):
        rh1 = rh1 + ord(s[i-1])*(2**i)
        rh2 = rh2 + ord(s[-i])*(2**i)
        if rh1 == rh2 and s[:i] == s[-i:]:
            d[s] += DFS(s[i:-i])
    return d[s]
print(DFS(s)%mod)