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;
int n;
char str[1000000];
int main() {
  int r;
  scanf("%s", str + 1), n = strlen(str + 1), r = n + 2;
  long long ans = 0;
  for (int i = n - 1; i >= 1; --i) {
    for (int j = 1; i + 2 * j <= n; ++j) {
      if (str[i] == str[i + j] && str[i + j] == str[i + 2 * j]) {
        r = min(r, i + 2 * j);
        break;
      }
    }
    ans += (long long)max(n - r + 1, 0);
  }
  cout << ans << endl;
  return 0;
}