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 PYTHON3):

Solution:
# coding: utf-8

# Reuben Nascimento Morais - 2015033470
# CF50B. Choosing Symbol Pairs

import sys
from collections import Counter

for line in sys.stdin:
    line = line.strip()
    counter = Counter(line)

    count = 0
    for c in counter:
        count += counter[c] * counter[c]

    print(count)