package main

import (
	"fmt"
)

func main() {
	var S string
	fmt.Scan(&S)
	ans := make(map[string]bool)
	var dfs func(string, int, int)
	dfs = func(s string, l, r int) {
		if l == r {
			ans[s] = true
			return
		}
		s1 := s + string(S[l])
		s2 := s + string(S[r])
		dfs(s1, l+1, r)
		dfs(s2, l, r-1)
	}
	dfs("", 0, len(S)-1)
	//fmt.Println(ans)
	fmt.Println(len(ans))
}