import sys
sys.setrecursionlimit(10**9)
# from collections import deque
# d=deque()
s=list(input())
# for i in s:
# 	d.append(i)
n=len(s)
st=set()
# print(d)
def dfs(s,tmpl):
	if len(s)==0:
		st.add(tuple(tmpl))
		return
	dfs(s[1:],tmpl+[s[0]])
	dfs(s[:-1],tmpl+[s[-1]])
dfs(s,[])
print(len(st))