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 JAVA):

Solution:
import java.util.Scanner;

public class Problem {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String s = input.next();
        int n = input.nextInt();
        int[][] qur = new int[n][2];
        for (int i = 0; i < n; i++) {
            qur[i][0] = input.nextInt();
            qur[i][1] = input.nextInt();
        }
        int[] dir = new int[s.length()];
        int counter = 0;
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) == s.charAt(i + 1)) {
                dir[i] = ++counter;
            } else {
                dir[i] = counter;
            }
        }
        int [] res = new int [n];
        for (int i = 0; i < n; i++) {
            if (qur[i][0] == 1) {
                res[i] = dir[qur[i][1] - 2];
            } else {
                res[i] = dir[qur[i][1] - 2] - dir[qur[i][0] - 2];
            }
        }
        for ( int i = 0 ; i < n  ; i++ )
            System.out.println(res[i]);

    }
}