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.*;
import java.io.*;

public class solution
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        String S = input.nextLine();
        int matrix[] = new int[S.length()];
        for(int i=0;i<S.length();i++)
        {
            matrix[i] = 0;
        }
        for(int i=1;i<S.length();i++)
        {
            if(S.charAt(i) == S.charAt(i-1))
            {
                matrix[i] = matrix[i-1] + 1;
            }
            else
            {
                matrix[i] = matrix[i-1];
            }
        }
        int n = input.nextInt();
        int ans[] = new int[n];
        for(int i=0;i<n;i++)
        {
            int a = input.nextInt()-1;
            int b = input.nextInt()-1;
            ans[i] = matrix[b] - matrix[a];
        }
        for(int i=0;i<n;i++)
        {
            System.out.println(ans[i]);
        }
    }
}