Problem: There is a given string S consisting of N symbols. Your task is to find the number of ordered pairs of integers i and j such that

1. 1 ≤ i, j ≤ N

2. S[i] = S[j], that is the i-th symbol of string S is equal to the j-th.

Input

The single input line contains S, consisting of lowercase Latin letters and digits. It is guaranteed that string S in not empty and its length does not exceed 105.

Output

Print a single number which represents the number of pairs i and j with the needed property. Pairs (x, y) and (y, x) should be considered different, i.e. the ordered pairs count.

Examples

Input

great10


Output

7


Input

aaaaaaaaaa


Output

100

Solution (in JAVA):

Solution:
import java.util.Scanner;

public class B50 {
	public static void main (String args[]){
		Scanner in = new Scanner(System.in);
		char a[] = in.next().toCharArray();
		long ans = 0 ;
		long t[] = new long[200];
		for(int i = 0 ; i < a.length;i++){
			t[a[i]]++;
		}
		for(int i = 0 ; i < t.length;i++){
			ans += t[i]*t[i];
		}
		System.out.println(ans);
	} 

}