Problem: Toad Rash has a binary string s. A binary string consists only of zeros and ones.

Let n be the length of s.

Rash needs to find the number of such pairs of integers l, r that 1 ≤ l ≤ r ≤ n and there is at least one pair of integers x, k such that 1 ≤ x, k ≤ n, l ≤ x < x + 2k ≤ r, and s_x = s_{x+k} = s_{x+2k}.

Find this number of pairs for Rash.

Input

The first line contains the string s (1 ≤ |s| ≤ 300 000), consisting of zeros and ones.

Output

Output one integer: the number of such pairs of integers l, r that 1 ≤ l ≤ r ≤ n and there is at least one pair of integers x, k such that 1 ≤ x, k ≤ n, l ≤ x < x + 2k ≤ r, and s_x = s_{x+k} = s_{x+2k}.

Examples

Input


010101


Output


3


Input


11001100


Output


0

Note

In the first example, there are three l, r pairs we need to count: 1, 6; 2, 6; and 1, 5.

In the second example, there are no values x, k for the initial string, so the answer is 0.

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  cin.tie(0)->sync_with_stdio(0);
  string s;
  cin >> s;
  const int n = (int)s.size();
  vector<int> r(n, n);
  for (int k = 1; k <= 20; ++k)
    for (int i = 0; i < n - 2 * k; ++i)
      if (s[i] == s[i + k] && s[i] == s[i + 2 * k]) r[i] = min(r[i], i + 2 * k);
  for (int i = n - 2; i >= 0; --i) r[i] = min(r[i], r[i + 1]);
  ll ans = 0;
  for (int i = 0; i < n; ++i) ans += n - r[i];
  cout << ans << '\n';
}