Problem: Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT exam.

You've got string s = s1s2... sn (n is the length of the string), consisting only of characters "." and "#" and m queries. Each query is described by a pair of integers li, ri (1 ≤ li < ri ≤ n). The answer to the query li, ri is the number of such integers i (li ≤ i < ri), that si = si + 1.

Ilya the Lion wants to help his friends but is there anyone to help him? Help Ilya, solve the problem.

Input

The first line contains string s of length n (2 ≤ n ≤ 105). It is guaranteed that the given string only consists of characters "." and "#".

The next line contains integer m (1 ≤ m ≤ 105) — the number of queries. Each of the next m lines contains the description of the corresponding query. The i-th line contains integers li, ri (1 ≤ li < ri ≤ n).

Output

Print m integers — the answers to the queries in the order in which they are given in the input.

Examples

Input

......
4
3 4
2 3
1 6
2 6


Output

1
1
5
4


Input

#..###
5
1 3
5 6
1 5
3 6
3 4


Output

1
1
2
2
0

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int m;
  cin >> s;
  int n = s.length();
  vector<int> count[n];
  int k;
  for (int i = 0; i < 1; i++) {
    count[i].push_back(0);
    for (int j = i + 1, k = 1; j < n; j++, k++) {
      count[i].push_back(s[j - 1] == s[j] ? 1 + count[i][k - 1]
                                          : count[i][k - 1]);
    }
  }
  cin >> m;
  int a, b;
  for (int i = 0; i < m; i++) {
    cin >> a >> b;
    a--;
    b--;
    cout << count[0][b] - count[0][a] << endl;
  }
  return 0;
}