Problem: You are given a non-empty string s consisting of lowercase letters. Find the number of pairs of non-overlapping palindromic substrings of this string.

In a more formal way, you have to find the quantity of tuples (a, b, x, y) such that 1 ≤ a ≤ b < x ≤ y ≤ |s| and substrings s[a... b], s[x... y] are palindromes.

A palindrome is a string that can be read the same way from left to right and from right to left. For example, "abacaba", "z", "abba" are palindromes.

A substring s[i... j] (1 ≤ i ≤ j ≤ |s|) of string s = s1s2... s|s| is a string sisi + 1... sj. For example, substring s[2...4] of string s = "abacaba" equals "bac".

Input

The first line of input contains a non-empty string s which consists of lowercase letters ('a'...'z'), s contains at most 2000 characters.

Output

Output a single number — the quantity of pairs of non-overlapping palindromic substrings of s.

Please do not use the %lld format specifier to read or write 64-bit integers in С++. It is preferred to use cin, cout streams or the %I64d format specifier.

Examples

Input

aa


Output

1


Input

aaa


Output

5


Input

abacaba


Output

36

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
bool ispalindromic(const string &s, int l, int r) {
  while (l < r)
    if (s[l++] != s[r--]) return false;
  return true;
}
int main() {
  string s;
  cin >> s;
  int n = s.size();
  vector<int> left(n, 0), right(n, 0);
  for (int i = 0; i < n; ++i) {
    for (int j = i; j < n; ++j) {
      if (ispalindromic(s, i, j)) {
        left[j] += 1;
        right[i] += 1;
      }
    }
  }
  for (int i = n - 1; i > 0; --i) right[i - 1] += right[i];
  long long ans = 0;
  for (int i = 0; i < n - 1; ++i) ans += left[i] * right[i + 1];
  cout << ans << endl;
  return 0;
}