S=input()

def dfs(S,NOW):
    #print(S,NOW)
    if len(S)==1:
        return [NOW+S[0]]
    
    ANS=[]

    ANS+=dfs(S[1:],NOW+S[0])
    ANS+=dfs(S[:-1],NOW+S[-1])

    return ANS

ANS=dfs(S,"")
print(len(set(ANS)))